I'm thinking about buying a Tacsew machine now. The old Singer I got and modified is amazing ... and I'm getting 5 stitches per inch when I sew on the suede sides but when I sew on the leather sides, there's just too much friction and I get like 9 stitches per inch (NG!). I tried a roller foot to no avail ... next week I'm gonna try a teflon foot and see if that works ... but if it doesn't, then I buy the Tacsew.
Looks like I won't be making my boots this weekend.
I found a great Tacsew, Model T111-155, on eBay (brand new) for only $850.00 - including shipping - and that includes the table and everything. It has the compound walking foot, too, which is absolutely crucial. You can buy just the head for $600.00 but what the hay.