I am having problems picking a machine that can sew bags made from lamb skin and other thin exotics as well as regular leather, but can also punch through the many layers at the handle attachment. My machines are for fabric, so I usually hand sew my leather projects. When I was learning, I discovered that the needle that I normally use for leather tears up the lamb skin - holes are too big. I switched to a smaller needle and thinner thread and the thread tore through when pulled tight. When attaching the handles to the bag, I am sewing through up to eight layers that are a little shy of an inch thick. A photo below of some of the projects that had thicker areas with very soft leather and or thicker hides (elk).
I had about decided to purchase a Campbell lockstich or something similar as I loved the beauty of those stitches and it seemed to be a machine that can handle anything. Since I use more delicate leathers, I think I need some advice. I want a machine that can punch through the layers (usually 6-8) when attaching handles and sew beautiful seams on 2 layers of thin soft leather without tearing it up (needle holes too large, thread pulled too tight). My bags are usually lined, so there is often a layer or 2 of fabric in the stack as well. I usually use Sajou Fil Au Chinios waxed linen number 432 or shiny machine embroidery thread for the seams.
Thanks!