@kenshirriff I got to play with a Honeywell ADC chock full of gyros and lasers and mirror, off of a 747-400 being parted out by Stratolaunch. We were going record A429 output data to use in a dumb ADC mimic box, but never got it going. Then someone told me just how expen$$$ive they were, and I put it back into inventory.