I also had a very positive experience with Tru Trak.
I have an ADI 3 that failed the attitude portion a year past the warrenty.
I called their number, got a job number which i wrote on the box, and sent it in. About a week and a half later it showed up. No Charge. The bill was zero, and described readjustment, verification of latest hardware and bench test.
I haven't re-installed it yet, but they sure stand behind their product.

__________________
Scott Emery
http://gallery.eaa326.org/v/members/semery/
EAA 668340, chapter 326 & IAC chapter 67
RV-8 N89SE first flight 12/26/2013
Yak55M, and the wife has an RV-4
There is
nothing-absolute nothing-half so much worth doing as simply messing around with
Aeroplanes
(with apologies to Ratty)
2019