[RC-Monster Mike]

I haven't had any troubles with the 4 screw mounting holes on my truck - I use the g-maxx motor mount, though. I only used 4 screws when I had the full tranny case as well, though. The coupler is available seperately if you want the extra security, as dafni pointed out(I did this as well, when I first got the single speed-I installed it at the track and didn't have my dremel to modify the top shaft so I only installed the coupler with some extra bearings as a spacer into the full tranny case).

Gustav - The 4mm motor plate is most likely plenty strong, but the longer motor could always stand some rear support IMO. Two 3mm screws , each with 3-5 threads are holding the entire motor in some harsh conditions. I have never had a failure in this area, but it always made me think that more support at the rear of the motor would be best.