Even with my treadles I use either the 1/4" foot with the little spring loaded guide, or one of these fabric guides that mount to the bed:
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I cannot get a consistent seam with tape or credit cards or some of the other things that stick on the bed. I need a physical guide to work against.
Treadles take a wee bit more coordination, but in reality there's nothing different about the sewing part of it. Only that your feet and legs are moving to drive the machine.
Joe