[JamesC]

What an not nice situation for both of you guys. I have seen and heard of plenty of avionics installs don't go well or at least have some glitches big and/or small, and I have also had a few to fix on my acft from several different avionics shops. Had plenty of work on my panel (attached picture), and the only bug free installs I ever had were at Aero Teknic at CYHU and I would recommend them to any Skymaster owner. Lots of small things eg. for the GTN 750/650 they corrected that there are supposed to be separate cct. breakers for each of the Nav and Com parts of the units, which is safer and also helps out when there is an low voltage problem. There would be some extra paperwork for N-numbered aircraft but on the other hand with the $ exchange rate the shop rate is excellent in USD.