Here is a look at mine in situ.
Installation is dirt simple. Power, ground, and 4 screws. Self-levels for pitch. For roll, leave screws loose, level aircraft, level instrument, and tighten screws.
Seems very accurate and stable. Does seem to get momentarily out of calibration when I maneuver aggressively, but "aggressive" for me means 80 degree bank angle. No big deal, just leans about 10 degrees off, but levels itself within a minute or so.
I removed my TC, so I needed the slip ball. Works fine but I wish it were bigger. The RCA is the only electronic AHI with an analog ball. I don't trust the electronic slip indicators. Don't ask me why, no reason, just doesn't seem like something that should be electronic.
Overall, good piece of equipment. Like I said, if I had a do-over I would probably go with the AV-30, just so I could get an HSI in the same device. But that is not a knock on the RCA, and if you already get those inputs from other devices, then the RCA would be fine. I bought mine used for $1500. They are overpriced new, IMO.
