I've been wanting a reliable jig to create and keep repeatable true radius cambers on my various plane blades. I have done them for years by hand and even have a Mark IV holder with camber roller but the repeatability to the accuracy I wanted still eluded me. The available commercial models (e.g. the Jet "wobble" and the Mark IV) rolled the blade about it's center line, but the radius was unpredictable. They aren't much better than doing it by hand. I saw a couple of LJ postings that involved a bolt and washer thought the blade slot. They were on the right track. There are some blades I have lightly cambered that do not have a slot. So I made this jig which can get a reliable, repeatable true radius up to 16". On a two inch blade that is a crown just short of 1/32". The setup is the same as for a straight blade: establish an extension, I chose 2" from the jig, set the angle, check the centering and start sharpening. This setup also moves to the honing wheel and the same radius is used for the hone. It's very quick because very little metal is removed from one touch up to another, a hallmark of the Tormek methods. BTW, I used my new router mill to machine the plastic plate slot.
Dan is an experienced woodworker who is anxious to make an heirloom of the future for you.