I don't have the machine you have, but I do sew leather, heavy canvas and webbing on it. Mine is a Pfaff but is still a domestic machine.
A few tips. Use the largest spacing your machine will allow (stitches widest apart) for leather otherwise the seam can rip if they are too close together.
Slacken off the thread tension if the thread keeps breaking.
Use talcum powder on the underside (dust it on and shake it off). You'll find your leather slides effortlessly under the foot. (You'll need to clean out the shuttle regularly though).
Use a strong polyester/cotton thread. Test it by trying to break it by pulling. If you can break it, it's no good for leather.
Use either leather needles or denim needles size 16 or 18. The tips of the leather needles are shaped in a way to make it easier to cut through the leather. Normal machine needles just push a hole in the material, that's no good for leather.
Practice on scrap material first and just see what the machine is capable of.
At the end of the row of stitching, use the reverse function to double back half a dozen threads or so to lock the ends off. That way you don't need to tie knots at the end of the bIt you've just stitched.
Hope this helps (the talc tip is handiest in my opinion).
Eric
