diff --git a/METIS/default.yaml b/METIS/default.yaml
index ae377944..95b958e5 100644
--- a/METIS/default.yaml
+++ b/METIS/default.yaml
@@ -7,7 +7,7 @@ name: METIS_default_configuration
 description: default parameters needed for a METIS simulation
 status: development
 needs_scopesim: "v0.11.3"
-date_modified: 2025-10-09
+date_modified: 2026-05-29
 changes:
   - 2021-12-16 (OC) chopnod defaults to perpendicular
   - 2021-12-16 (OC) default slits renamed
@@ -23,6 +23,7 @@ changes:
   - 2025-09-29 (OC) version bump
   - 2025-10-09 (OC) proper MJD value
   - 2026-03-31 (OC) set wave_min to 2.65um for bluest LMS settings
+  - 2026-05-29 (FH) added tech keyword to most modes
 
 packages:
   - Armazones
@@ -53,7 +54,6 @@ properties:
   #       corresponding yaml file with the keywords.
   tplname: "METIS_img_lm_obs_GenericOffset"
   catg: "SCIENCE"
-  tech: "IMAGE,LM"
   type: "OBJECT"
   # More default properties for the observation
   mjdobs: "61529.104"
@@ -82,6 +82,7 @@ mode_yamls:
       - METIS_DET_IMG_LM.yaml
     properties:
       ins_mode: IMG_LM        # use as FITS header keyword
+      tech: IMAGE,LM
       psf_file: PSF_SCAO_9mag_06seeing.fits
       filter_name: Lp
       nd_filter_name: open
@@ -102,6 +103,7 @@ mode_yamls:
       - METIS_DET_IMG_N_GeoSnap.yaml
     properties:
       ins_mode: IMG_N         # use as FITS header keyword
+      tech: IMAGE,N
       psf_file: PSF_SCAO_9mag_06seeing.fits
       filter_name: N2
       nd_filter_name: open
@@ -125,6 +127,7 @@ mode_yamls:
       - METIS_DET_IMG_LM.yaml
     properties:
       ins_mode: LSS_L         # use as FITS header keyword
+      tech: LSS,LM
       psf_file: PSF_LM_9mag_06seeing.fits
       trace_file: TRACE_LSS_L.fits
       efficiency_file: TER_grating_L.fits
@@ -150,6 +153,7 @@ mode_yamls:
       - METIS_DET_IMG_LM.yaml
     properties:
       ins_mode: IMG_M         # use as FITS header keyword
+      tech: LSS,LM
       psf_file: PSF_LM_9mag_06seeing.fits
       trace_file: TRACE_LSS_M.fits
       efficiency_file: TER_grating_M.fits
@@ -175,6 +179,7 @@ mode_yamls:
       - METIS_DET_IMG_N_GeoSnap.yaml
     properties:
       ins_mode: IMG_N         # use as FITS header keyword
+      tech: LSS,N
       psf_file: PSF_N_9mag_06seeing.fits
       trace_file: TRACE_LSS_N.fits
       efficiency_file: TER_grating_N.fits
@@ -201,6 +206,7 @@ mode_yamls:
       - METIS_DET_IFU.yaml
     properties:
       ins_mode: LMS          # use as FITS header keyword
+      tech: IFU
       psf_file: PSF_LM_9mag_06seeing.fits
       slit: false
       adc: false
@@ -212,7 +218,7 @@ mode_yamls:
     alias: OBS
     name: lms_extended
     description: "METIS LM-band integral-field spectroscopy, extended mode"
-    status: experimental
+    status: concept
     yamls:
       - Armazones.yaml
       - ELT.yaml
@@ -238,6 +244,7 @@ mode_yamls:
       - METIS_DET_IFU_SMPL.yaml
     properties:
       ins_mode: LMS_cube          # use as FITS header keyword
+      tech: IFU
       psf_file: PSF_LM_9mag_06seeing.fits
       interp_psf: False
       slit: false
@@ -259,6 +266,7 @@ mode_yamls:
       - METIS_DET_IMG_LM.yaml
     properties:
       ins_mode: IMG_LM        # use as FITS header keyword
+      tech: IMAGE,LM
       pupil_mask: PPS-LM
       psf_file: none
       psf_name: "!OBS.pupil_mask"
@@ -280,6 +288,7 @@ mode_yamls:
       - METIS_DET_IMG_N_GeoSnap.yaml
     properties:
       ins_mode: IMG_N          # use as FITS header keyword
+      tech: IMAGE,N
       pupil_mask: PPS-N
       psf_file: none
       psf_name: "!OBS.pupil_mask"
@@ -304,6 +313,7 @@ mode_yamls:
       - METIS_DET_IMG_LM.yaml
     properties:
       ins_mode: LSS_L        # use as FITS header keyword
+      tech: LSS,LM
       pupil_mask: PPS-CFO2
       psf_file: none
       psf_name: "!OBS.pupil_mask"
@@ -330,6 +340,7 @@ mode_yamls:
       - METIS_DET_IMG_LM.yaml
     properties:
       ins_mode: LSS_M        # use as FITS header keyword
+      tech: LSS,LM
       pupil_mask: PPS-CFO2
       psf_file: none
       psf_name: "!OBS.pupil_mask"
@@ -356,6 +367,7 @@ mode_yamls:
       - METIS_DET_IMG_N_GeoSnap.yaml
     properties:
       ins_mode: LSS_N        # use as FITS header keyword
+      tech: LSS,N
       pupil_mask: PPS-CFO2
       psf_file: none
       psf_name: "!OBS.pupil_mask"
@@ -383,6 +395,7 @@ mode_yamls:
       - METIS_DET_IFU.yaml
     properties:
       ins_mode: LMS          # use as FITS header keyword
+      tech: IFU
       pupil_mask: PPS-LMS
       psf_file: none
       psf_name: "!OBS.pupil_mask"
@@ -396,7 +409,7 @@ mode_yamls:
     alias: OBS
     name: wcu_lms_extended
     description: "METIS LM-band integral-field spectroscopy, extended mode with WCU"
-    status: experimental
+    status: concept
     yamls:
       - METIS_WCU.yaml
       - METIS.yaml
@@ -427,6 +440,7 @@ mode_yamls:
       - METIS_DET_IMG_LM.yaml
     properties:
       ins_mode: LSS_L        # use as FITS header keyword
+      tech: LSS,LM
       psf_file: PSF_LM_9mag_06seeing.fits    # REPLACE!
       trace_file: TRACE_LSS_L.fits
       efficiency_file: TER_grating_L.fits
@@ -451,6 +465,7 @@ mode_yamls:
       - METIS_DET_IMG_LM.yaml
     properties:
       ins_mode: LSS_M        # use as FITS header keyword
+      tech: LSS,LM
       psf_file: PSF_LM_9mag_06seeing.fits    # REPLACE!
       trace_file: TRACE_LSS_M.fits
       efficiency_file: TER_grating_M.fits
@@ -475,6 +490,7 @@ mode_yamls:
       - METIS_DET_IMG_N_GeoSnap.yaml
     properties:
       ins_mode: LSS_N        # use as FITS header keyword
+      tech: LSS,N
       psf_file: PSF_N_9mag_06seeing.fits    # REPLACE!
       trace_file: TRACE_LSS_N.fits
       efficiency_file: TER_grating_N.fits
@@ -500,6 +516,7 @@ mode_yamls:
       - METIS_DET_IFU.yaml
     properties:
       ins_mode: LMS          # use as FITS header keyword
+      tech: IFU
       psf_file: PSF_LM_9mag_06seeing.fits    # REPLACE!
       slit: false
       adc: false
@@ -511,7 +528,7 @@ mode_yamls:
     alias: OBS
     name: leiden_lms_extended
     description: "METIS LM-band integral-field spectroscopy, extended mode with Leiden sky"
-    status: experimental
+    status: concept
     yamls:
       - Leiden_sky.yaml
       - METIS.yaml
diff --git a/METIS/headers/FITS_img_lm_keywords.yaml b/METIS/headers/FITS_img_lm_keywords.yaml
index 63e7ff31..e5f1b890 100644
--- a/METIS/headers/FITS_img_lm_keywords.yaml
+++ b/METIS/headers/FITS_img_lm_keywords.yaml
@@ -4,7 +4,7 @@
     HIERARCH:
       ESO:
         DPR:
-          TECH:   "IMAGE,LM"
+          TECH: "!OBS.tech"  # duplicate from FITS_common_keywords.yaml
         INS:
           OPTI4:                # LMS beamsplitter pickoff wheel
             DEVSIM: [true, "Device simulation flag"]
diff --git a/METIS/headers/FITS_img_n_keywords.yaml b/METIS/headers/FITS_img_n_keywords.yaml
index d28cbb62..baa285bd 100644
--- a/METIS/headers/FITS_img_n_keywords.yaml
+++ b/METIS/headers/FITS_img_n_keywords.yaml
@@ -4,7 +4,7 @@
     HIERARCH:
       ESO:
         DPR:
-          TECH:   "IMAGE,N"
+          TECH: "!OBS.tech"  # duplicate from FITS_common_keywords.yaml
         INS:
 
           OPTI4:                # LMS beamsplitter pickoff wheel
diff --git a/METIS/headers/FITS_lms_keywords.yaml b/METIS/headers/FITS_lms_keywords.yaml
index 6507841c..0435e71c 100644
--- a/METIS/headers/FITS_lms_keywords.yaml
+++ b/METIS/headers/FITS_lms_keywords.yaml
@@ -4,7 +4,7 @@
     HIERARCH:
       ESO:
         DPR:
-          TECH:   "IFU"
+          TECH: "!OBS.tech"  # duplicate from FITS_common_keywords.yaml
         INS:
           LMS:                  # LMS mode (Nominal or Extended)
             MODE: "Nominal"
diff --git a/METIS/headers/FITS_lss_keywords.yaml b/METIS/headers/FITS_lss_keywords.yaml
index 82059b3a..5b98a70a 100644
--- a/METIS/headers/FITS_lss_keywords.yaml
+++ b/METIS/headers/FITS_lss_keywords.yaml
@@ -4,7 +4,7 @@
     HIERARCH:
       ESO:
         DPR:
-          TECH:   "LSS"         # TODO: How to add the filter name?
+          TECH: "!OBS.tech"  # duplicate from FITS_common_keywords.yaml
         INS:
           OPTI4:                # LMS beamsplitter pickoff wheel
             DEVSIM: [true, "Device simulation flag"]
diff --git a/MICADO/default.yaml b/MICADO/default.yaml
index 6f5937f9..f3614ae8 100644
--- a/MICADO/default.yaml
+++ b/MICADO/default.yaml
@@ -7,7 +7,7 @@ name: MICADO_default_configuration
 description: default parameters needed for a MICADO simulation
 status: development
 needs_scopesim: "v0.11.3"
-date_modified: 2025-10-09
+date_modified: 2026-05-29
 changes:
   - 2023-07-13 (OC) add modes for FDR slits, deprecate pre-FDR slits
   - 2025-06-27 (FH) add needs_scopesim keyword
@@ -15,6 +15,7 @@ changes:
   - 2025-10-17 (JB) add parametes for FITS keywords, tplstart as MJD
   - 2026-01-02 (OC) random seed to None
   - 2026-04-09 (OC) new SPEC mode, rename slits
+  - 2026-05-29 (FH) added tech keyword to most modes
 
 packages:
 - Armazones
@@ -39,7 +40,6 @@ properties :
   dit : 60
   ndit : 1
   catg : SCIENCE
-  tech : IMAGE
   type : OBJECT
   # Should be datetimes, but is copied verbatim, so should work.
   mjdobs : 61529.104
@@ -85,6 +85,7 @@ mode_yamls :
     filter_name_fw1: open
     filter_name_fw2: Ks
     filter_name_pupil: open
+    tech: IMAGE
     fits_ins_filt: Ks
 
 - object : observation
@@ -98,6 +99,7 @@ mode_yamls :
     filter_name_fw1: open
     filter_name_fw2: Ks
     filter_name_pupil: open
+    tech: IMAGE
     fits_ins_filt: Ks
 
 - object : observation
@@ -139,6 +141,7 @@ mode_yamls :
     filter_name_fw1 : Spec_HK
     filter_name_fw2 : open
     filter_name_pupil : open
+    tech: SPEC
     fits_ins_filt : Spec_HK
 
 - object : observation
@@ -155,6 +158,7 @@ mode_yamls :
     filter_name_fw1 : Spec_HK
     filter_name_fw2 : open
     filter_name_pupil : open
+    tech: SPEC
     fits_ins_filt : Spec_HK
 
 - object : observation
@@ -171,6 +175,7 @@ mode_yamls :
     filter_name_fw1 : Spec_IJ
     filter_name_fw2 : open
     filter_name_pupil : open
+    tech: SPEC
     fits_ins_filt : Spec_IJ
 
 ---