Hank, my Singer 328k, got moved into my straight-leg treadle. I had to move treadles around to make room for my Two Spools treadle. The issue with the treadle belt hitting the metal part under the bobbin area on the 328k improved by changing the treadles, but it still rubs against that area just slightly. It is easier to treadle now. I just can't imagine that Singer design a machine to treadle and have the belt hit the machine. Others have cut the metal out where it rubs, but I do not wish to deface the machine.