My first ever quad was a Diatone GT-R90 that I bought from Grayson's, and had a FrSky XM pre-installed. This proved to be a very bad choice for a first drone... I learned the hard way. I ended up crashing it really hard into cement and completey destroyed the frame. By this time the GT-M2 and M2.5 had come out and you could buy their frames seperatly. So after doing so measuring I decided I'd try to fit my R90 guts into a M2.5 frame. It was only a LITTLE bit bigger, I could run 2.5 props. I also ordered frame parts for the replacement R90 incase this experiement didnt work out. (It did work out and I used the R90 parts to rebuild the 90 for a friend). I also orderd the TBS video board that the vtx mounted to on the newer M series. I had to play around a lot with the billion spacer rings that it came with, but eventually made it work. During the crash one of the low ESR caps fell off and I know at some point I drilled holes in the main bat power connections and ran a cap through that. I cant remember if I kept it in or not. SADLY I lost this drone to a jerkface tree shortly after this awesome rebuild...also lost a few baseballs, countless nights with a slingshot and fishing line, and money to a tree service company to climb up there and get it down.... I really, really, hate that tree. It was never found. Lost to the quad gods. I loved this thing. It flew forever and had tons of power (for me). I also upgraded the camera to a Eagle Micro RunCam, and the recierver to a XM+. Sad to have lost it but I did learn a lot along the way. I know it's old now but if anyone wanted put their crashed guts of a R90 into a different, and stronger, frame - it works with no soldering or adding wire!

Also, F that tree.