first im not knocking anyone's decisions on how they upgraded, but my thought is if i'm going to spend 10 grand or more on a new EFIS system, i want it to look like it was meant to be their. not added after the fact. Spend the extra time and redo the panel so it looks like it was built that way. I have hated the look of overlays forever.
when I re-paneled my RV-4 it was a total redo.
just my .02
bob burns
RV-4 N82RB