thanks for the Info John, I've seen a lot of "generic" cabinet that are designed for machines like this, so maybe that is what the OP was referring to. They are a bit newer than the machines and cabinets I typically deal with. I did modify an older Singer cabinet that was for an open arm machine. there was a clamp to hold them machine to the fold down table, and then you used a plastic insert to fill in the area around the machine if you did not want to use it for open arm. I put a fixed base in at the right height for my Viking so it sticks up just enough for the open arm to line up with a larger top - that I just slide out of the way to get at the bobbin case or us it open arm. though I think if I was doing some serious open arm work. I'd lift the machine and slide the top all the way over and set it on that.
