So far, I have only identified one issue with the GNS 430, which is mounted in the A-36. In manipulating the lower left and lower right (inner and outer)knobs , I can tune frequencies and add direct waypoints, et al. What I cannot do is press on either of those knobs.
Thus, I cannot activate the cursor with the right knob, or cycle between the com freq's and the nav freq's with the left knob. FYI - I just downloaded my A-36 last weekend.