I built a second panel for my RV-6A tip up a year ago (to put in Dynon HDX system) and just followed the plans. Cut and notched the angle and had no problems. Did the same on my Rv-6 tip up and they fit fine.I have an oversized blank panel for my rv6 tip up. I am about ready to cut it to size but thought there might be some advice from the group. Also has anyone made the attach strip that is made from ,063 angle and is bent to match the curve of the panel?