Would the Chinese laser tube respond quickly enough to make it worth attempting an upgrade to 80+ inches per second? Present high quality rastering is about a quarter of that.

This sort of kit caught my eye, partly whilst looking for what to replace my early failing x-axis stepper driver with...

http://www.motioncontrolproducts.co...._servo_system/

The compromise option might be this:

http://www.motioncontrolproducts.com...d556.php?cat=2