I know there are a couple reports of the G5s leaning to one side or the other or flashing the message "aligning keep wings level" after steep turns or turbulence but without actually seeing how they were installed and verifying that all the requirements of the install manual were met its difficult to say if its a hardware problem or an install problem.
Anyway, the manual says the instrument panel must be at least 0.040 thick aluminum (IIRC), the 182 was .050 I think. I made two .040 plates to sandwich the OEM panel between them with a filler of .050, and ended up with .130.
Anyway, we picked up the airplane yesterday in Greeley Colorado from these guys and test flew the GFC500
https://advancedaerotech.com. I would use them again in a heartbeat.
I had tried to make the G5s fail in turbulence, steep turns, rudder swings everything. Yesterday we got beat to death in turbulence flying around Greeley. It was horrible trying to make a new autopilot do what I wanted, mostly because the user interface was all new to me. Once I got it turned on and holding altitude and heading the whole thing blew me away. This thing is rock solid. Shot LPV into 10 and it just does it. The electric/auto pitch trim is seamless.
I couldn't be happier with how it turned out. This is Dad's "retirement" airplane and he flew it 3 hours home by himself from Greeley while I followed in the Cardinal. His first full featured autopilot experience, the smile is huge.
About a month after he bough this airplane Garmin announced STC for the G5s. I never thought the autopilot would follow. A lot stars aligned to get us here as he was looking at other autopilots , had planned on getting a new one and hand money to do it. I'm glad I got him into this system. From a MX standpoint its a no brainer. A brand new replacement G5 is around $1200. A brand new GSA28 replacement servo is under $2k. (Trutrak should be similar) The other guys can't even repair their products for that.