I have several machine heads with no treadle so I made a mutt out of a singer straight leg treadle. I made a top from scrap plywood and cut out the center to receive inserts for diff heads. The inserts are all the same to fit this cut out but the cut out in each insert is fitted to each machine. This insert is for my White VS. I chose the straight leg treadle because it is small and I can carry it to Toga and use whatever machine I decide to take. It took sometime to align the insert and the machine with wheel. It was not hard just had to measure carefully. It works great. I will make inserts for my chainstichers also.