I WAS LACKING A MERE eight inches of tentalone before finishing the third pinecone so tonight after dinner I got after the problem. I had sliced up a large number of pieces of basswood about a year ago for just this purpose. I grabbed a couple of them, rough cut on the bandsaw intentionally too thick. Ran them through my Ryobi planer to smooth them up and get them the right thickness. It does a really nice job.
Now I can make the tentalones I need to finish the job. The freshly cut workpiece slides toward the bandsaw blade until it is stopped by the protruding index point carved into the boxwood "bolt" that slides unseen in this picture in a mortise cut on the underside of the piece of wood just left of the blade. The index point slips into the second cut left of the blade in this picture and stops the movement of the workpiece that I am gently pushing with my fingers. The "bolt" is powered by the single rubber band. You push the gismo forward to make the cut. There is a stop block unseen here, clamped to the saw table. The stop block, after being adjusted carefully, stops the cut at just the right place to allow the tentalones to bend nicely around the instrument, but not so deep that they break too easily. I can make a lot of tentalones on this simple little device in a very short time, (once you get the stock sawn, planed and ripped that is. Oh, I know, it might be smarter to buy these things from a luthier supply house, but these are hand made ukes after-all.