All this sounds too complicated for me. Being a simple DIY Kiwi I made up my own jig and cut all my own triangular stock as required.

I started with a 6" length of scrap 1/2" x 1/2" x 1/16" ali. angle and a piece of MDF board 6" long x 3" wide x3/4". My friendly joinery shop cut a triangular groove full length along this into which I epoxied the ali angle - apex down and open side up of course!

I hold this jig centered on and close to the blade of my Dremel jigsaw for small stuff or the bandsaw for larger stock with one hand and feed the square stock through this into the blade with the other - simple, cheap. accurate!

Alan W