I can’t find the “Grip_Enable” parameter in Copter 3.6.3…Has the name of the parameter changed?
It’s still there but it’s possible that the flight controller has been detected as a version which suffers from the 1MB limit. For these boards we provide a “v2” firmware that is missing some features including the Gripper. I suspect the “v3” will fit on the board even though it’s suffering from the 1MB limit so you could try directly downloading the “v3” firmware from this directory (look for “v3” in the name) and then upload it using the GCS’s “Load Custom firmware” option. Also the ChibiOS firmwares are smaller so they always include all features.
Thanks Randy!! You the Man!!!