Ollie .... it sounds like you want a machine to put in a treadle base that you already have. Instead of adapting your featherweight to the treadle ... look for a treadle machine head to fit your base. There are PLENTY of machine heads around .... craigslist.com, ebay.com and also look through auctions in your area. If your treadle cabinet is a Singer - so much the easier as they are by far the easiest to find, but others can be adapted as well.