Just registered here..   After a lot of google searching, I found a few older threads here discussing use of Singer 212g140 model to stitch leather.   I see it can be used to do both dual and single needles, seems good.   Found one with a 110v motor. Somewhat reasonable price.   So, how heavy can the singer 212 normally stitch? What is the most thick material I could fit between the bed and needle?   Machine is not local and am wanting input befo