When I line my western gunbelts I use suede, glued and sewn, I can only find a source for double shoulders and if the belt is too long I need to splice the lining. I've been doing this with a baseball stitch to hold the two pieces together until it's glued, which works good up until I need to trim the excess lining. When I trim the lining, I have to cut the threads at the end of the stitch line, which means the stitch line has no finish. It's glued down, but my concern is over time the thread may pull and the spliced edge could lift.
If anyone could suggest a better way, I'm all ears