My Stroh violin doesn't have a body, which means you can't mount a regular shoulder rest. It just has a bit of metal:

Playing it this way is uncomfortable, and ages ago I made something out of wood and an old 1/2 size shoulder rest I found lying around. Then I took it off, and it's been back to being uncomfortable. Today I made a new one:

It's a piece of 1/4" plywood for a full-size shoulder rest to grip, a piece of 3/4" plywood for getting the distance right and something for screws to bite, and then it attaches to the metal plate on the Stroh with screws around the perimeter.

Here's me playing Sandy Boys, with intonation that's very nearly right:

youtube

It doesn't sound great, but at least it's comfortable.