I don't know if you've seen my long running build thread, Which ive only just started :-) ut this is what I am planning on doing with the motor, It will clear the gantry and bed just.

The first image is showing the belt and bearings, the second is showing it with a 50x25 channel housing the belt and also holding the motor and idler bearings. I may have to use a larger channel but I wont know until I get to that bit.

Cheers, Charlie