i think if you got a piece of wood as thick as the space is between bottom of the top and the top of the bottom shelf{where the machine is ] and 4 carriage bolts ...you will have a small bump but out from the machine where the bolt is [they have rounded heads your fabric should not get caught on them ] and maybe one in the back of machine ....can't see how much room is there ......but that would make the shelf solid and not vibrate so much ...good luck