re:
Hensley Patent (and a minor mention of patent issues in several posts
here)
I recall another thread questioning if other manufacturers would jump onto the Hensley design. Depending on design mods and Hensley renewing their patent (
à la "the little purple pill" becoming 2nd & 3rd generation derivative products after...) I suspect the market is rather limited but appealing if one were a minor machine shop trying to capture any sales.