These pictures document mixing a non-lego motor and switches with legos.

Pictures a thru n show the motor housing.  In Picture a is the complete assembled 
motor housing, with the motor inside and gear attached.  Pics b thru n show the 
same housing in various stages of dissasembly to illustrate how it goes together.

Pics o thru q show the same motor worked into my bucket wheel excavator to power
some conveyor systems.

Pic r is of the switches I use for control, two are mounted side by side in a plate 
that I've drilled a hole through.  

Each switch has forward, reverse and off, three positions.  Center position is off, and 
they come in either "sticky" or "unsticky" versions, meaning some will hold their 
position when switched, and the others snap back to off when you release.

Pics s thru z are of a joystick I built using those same switches.  The joystick is 
made of standard lego bricks and technic bricks and has four positions, left, right, 
up and down.  The stick controls two motors, one with the right-left action and the 
other with the up-down motion.  

The joystick is a really nice touch for a Lego model and makes it really fun and easy
to operate a motorized MOC.

Email me at generaldisarray2005@yahoo.com if you have questions or comments!

-Ben