That plywood is called Baltc Birch it is GREAT stuff to work with. It is metric at about 11 or 12 mm thick, but not such a big deal.

I plan to line the V-notches with felt so they will be smooth enough to slide the blank pretty easily. I'll see how it works. I can alway replace the short block the threader is mounted on with a longer one and stick the proverbial screw eye out on the end of it. I almost did it that way to start, but decided to try this cause I like thins simple...