That's a nifty project.
When you design your project you add holes that will be drilled in the first side of the project blank sized for a snug fit for some dowels. As Doug said the more the better. Three work pretty good. These holes need to be precisely located in relation to the overall center of the project. Then another set of holes is set up by locating them by mirroring around the job center so they are a flipped version of the ones for the project blank.
I used 3 and it worked pretty goodMore dowels the better! I did 2 and had a little slip because they weren't really 1/4" diameter, tried again with 4 dowels and worked great
Drilled 3 holes on the top side and put dowels in them. Then mirrored the hole pattern on a spoilboard. The dowels will fit in those holes and (hopefully) you can cut the backside accurately.
That's what counts HJ, it worked and looks like a pretty cool method.I used 3 and it worked pretty good
ShhhhhFantastic results but I'm guessing, like the government, it cost more to make than the face value (think penny) Is that a counterfeit plug nickel?