[Dunngeon]

Originally Posted by R.C.

For encoders,

A handful of teams (254/1538/973/1323 etc..) have just drilled a hole at the end of the shaft, shove an encoder in there, and zip tie the wiring down.

http://puu.sh/bSXmC/4694259cf2.jpg

I would atleast snap ring the sprocket side and use a bolt/washer on the other side. If you don't have the resources you could always just buy the VersaChassis hex shaft:

http://content.vexrobotics.com/vexpr...awing-Rev2.PDF

Are you saying that 254/1538/973/1323 don't have any kind of retaining system on the interior axle shaft besides the encoder? I've always thought the shafts should be at least snapring or e-clip retained. The picture shows some kind of piece between the encoder and shaft, but I'm not sure what it is.