A nice idea for home made glueing jigs. Rockler Woodworking has some small assembly squares made from a plastic that glue does not stick to. They make these in two sizes and have a new set that is angle adjustable. They call these jigs "Clamp its" and they also have special miniature F style clamps designed to fit them.
Mike "Living in the D" (this means Detroit!) "It's fine to disagree with other members as long as you respect their opinions"
When I made it, I did not mean to use it for gluing.
After I made it I thought that if I copy it to 1/2" or 3/4" and make slots for the clamps, it can be used also for gluing.
I forgot to mention that, in this case it's better to remove part of the apex, so it will not touch the glue squeeze-out at the carcass corner.