Thanks for the little walk through, wasnt sure if the sunlight water mix would affect the vinyl adhesion. I havent had edge lifting problems with the many RC planes I've done over the years, or my cars C pillars in the 3 years since I applied it, it does sleep in the garage though.If there is some space to "fold" the vinyl around the edges - cut vinyl into shape of the panel (slightly larger), take vinyl backing off, place sticky side up, apply sunlight liquid (mix with water, about 50/50), make sure there is no grime and dust or dog hair, put panel on the vinyl. Turn around, smooth out (credit card works well as a squeegy, take hair dryer, blow dry, but not not too hot, you'll get the "feel" after a while - the heat helps with the adhesion, especially on corners, and also with the stretch around the edges. Use a nt-cutter to cut excess vinyl, and voila!
That said constant handling as in the case of a mod might be a different kettle of fish.
As @BumbleBee said 3 small security screws on the bottom hold it together and although its probably not a good idea if its your prime device @gdigitel both the affected panels on your one just slide out without any fuss or need to solder, no dropping + & - butttons either.
The fire button has a spring so its prudent to hold the mod when sliding the main back panel/batt door assembly off to keep the parts in the same neighbourhood.