I used to shy away from projects that included light weight leather, such as deer skin/ calves skin, upholstery leather and the like....
I just didn't like bothering with making the adjustments on my big machine.....
I finally decided I wanted to get the right machine to do the light stuff....found it in the Singer 15.91. I researched it and decided it was the machine I needed, so set out to find one. It took about two days and found one on Craigs. I really lucked out...this one is clean and had been very well maintained...and did I say CLEAN!!
With the right needle and thread, it is perfect for leather up to about 5-6oz I figure...I'm sure some can do better, but I won't push it as my big gun is at the ready for heavier stuff. And it will also do fabric with a needle and thread swap.
It's called a "home sewing machine", but darn nice having it in the shop....