Another guy I know has a similar motor (rebadged), and his front endbell also came apart easily. Of course when I want mine to be that way, it isn't

. Oh well.
The motor is going in a custom Savage conversion.
http://smg.photobucket.com/albums/v132/4x4pede/Savage/
I was able to modify the motor plate I originally made to accept the larger 30mm mounting pattern (normal 540 motors have a 25mm mounting pattern) and the 4mm screws.
SH Z-Car, Custom Crawler, 8s Savage,
12s XTM XLB 1/7 buggy,
4wd 4-link rear/IFS Pro4 truck,
Custom Hyper 10 Short Course,
Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz