Thanks for the info. OK, toggle clamps... Amazon has them for $10.xx. They appear to be the right size, so I ordered some. McMaster-Carr has 'em, but, selection is too comprehensive, heh, and you have to look for rubber tips and plunger parts separately.

: There is an oak strip on the bottom that fits SNUG in the miter
: slot in the saw top. It slides easy with a little candle wax on
: it but it doesn't wobble. That is probably the hardest part for
: most people to make. It's important that it fits well.

: Once that is installed I run the jig through the saw to trim it
: flush with the blade.

: The toggle clamps are available in a lot of places. Most
: woodworkers suppliers carry something similar. I think I
: searched Google Shopping and found these rather cheap. Since
: they don't see a lot of use I used cheaper ones. They can be
: pricey but the best ones are made for industrial use too.