I just secure an appropriate length of anything with a straight
edge to the top of my wavy edged board with double sided tape
or hot glue. Works great for me and I have no jig to build, store,
or wish was longer/shorter/wider/narrower.

Art

"eganders" wrote ...
[snip]
Basically, I want to hold the board with as short a jig as possible.
Right now it is 8 ft long. I want to put a straight edge on boards up
to 8 ft long, but I don't think I need an 8ft jig. Just would like any
suggestions for modifying what I have so far.

Ideas anyone?