Step 6Mount your motors - edge style
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Your motors should be mounted so that the sprockets are as close as possible to the drawing surface. If you have a thick surface, you can get away with just sticking your motors to the top edge of the board with double-sided foam tape. This is actually a nice way of doing it because it cushions the vibration too. The motors do tend to twist a bit, because their little foam rafts have some stretch in them, but on mine it wasn't really a problem unless I left the gondola hanging for days.
This arrangement is much neater when it comes to cabling and things too. It all hangs down the back.
If you have access to a 3d printer, there is a neat stepper motor mount available at http://softsolder.com/2011/08/23/nema-17-stepper-motor-mount/.