The Elevate variable mortise and tenon jig is great, but it can be a bit fiddly to line up with the body when cutting the mortise. This two prints help to line up the jig on the side of the guitar to a pencil line, and cross check that the mortise is lined up with the centreline of the top, past the sound hole.
These are modelled for the 7/8' version and are offset so that a .5mm mechanical pencil will be on the center.
The body extension needs to be printed with supports.