Rare opportunity. Fully operational Experimental aircraft auto pilot. Trio Pro Pilot Auto pilot Recently removed for RV8.  Compact instrument mounted style unit. Fits in a standard 3 1/8" instrument hole. Many people directly replace for turn coordinator. Functions include: slip/skid, heading, pilot command steering, course, track offset, intercept, alt hold, climb/descent, alt preselect, GPSS, GPSV, 180 emergency turn, fuel flow/calculation level, built in loss of control  protections. Recently updated firmware. Wiring harness included. Note: Roll servo case was slightly modified for installation.