In 1970, Howard Ray Longbrake - a resident of Grafton, Ohio - invented a broadhead sharpener. This consisted of an aluminum clamp with angle-guides of thin, narrow strips of aluminum, with holes for 17-, 20-, and 25-degrees. Using short, slotted lag-screws, the guides could SWIVEL for maximum reach. A medium, slim-taper NICHOLSON file completed the kit - this had a socket with the guide-rod brazed or soldered to the business-end of the file. Later, he used the same clamp for his knife-sharpening kit. It came with coarse, medium and fine stones, and you had to assemble the ENTIRE stone-holder - each stone was held in an aluminum “cradle”, with two threaded bolts that had to be secured to an aluminum bar with closed-end sockets. The guide-rod setup was the same as the LANSKY. If you want this clunker, his website is still there, but after 2 fail-to-deliver e-mails and 3 phone-calls, I gave UP. Vintage kits you’ll find on e-Bay - i kept the CLAMP from mine, and tested the aerodynamics of the kit long ago. For some reason, swivel-guides never caught on with later designs. FYI
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