I sent you the dimensions drawings today. For a rolling workbench, I would consider using the leveling caster (see https://www.amazon.com/FOOTMASTER-GD...eveling+caster for an example). You want to be able to move the machine up off the casters. If you don't it'll walk itself across the floor. We are using casters w/ leveling for the stand which is in prototyping now. If you want a set, I can put 4 in with your machine shipment.
Regarding the phone: My operations are mostly at night. If you want to catch me directly the best time is from 5pm to 10pm EST.