I have read a lot of concerns about the GPS shielding mod, worries about shorting, etc. I am a retired Microwave Engineer, and have used 3M Copper Tape (1181) for over 20 years. I can tell you this, I have never seen it lose adhesion. It was designed specifically for use in Electronic systems, and obviously adhesion loss of conductive copper foil would be disastrous. In fact, after it has had a while to set, it's a real PITA to remove. Do not worry along those lines. As far as "shorting" goes, it is a non-issue. Look at the wifi module. No insulating paint or tape. Everything metal in the bird has a ground potential on the outside, if it doesn't, it has an insulating layer, The obvious exceptions are solder points on the ESCs, etc. It would take a catastrophic failure to bring those points in contact with the tape. At that point, the short would be an afterthought. If the tape touches anything else, it will just achieve system ground potential, which might or might not effect the GPS Sat signals. The "shielding" mod may also be offering convex Ground Plane functionality. I may try an experiment and actually make a jumper from the GPS shield to system ground and see if there is any difference in performance. The other point I would make, is do not use aluminum duct-sealing tape. The adhesive on the 1181 contains conductive copper particles, and, if the joints are overlapped and burnished down properly, will appear as a contiguous conductive surface to RF. Aluminum tape has no such thing, and the non-conductive adhesive will act to insulate one piece from another and create a capacitor or slot radiator at RF frequencies. Also, and very important, copper tape should never be re-used. It will never achieve the same contact again. Use solvent to remove all adhesive, and apply fresh tape.