This is a pretty cool-looking product. An article on its use, with plenty of pics, is here.
Found the link at Varmint Al’s. Varmint Al’s website is pretty much the website I want to build when I retire — just a big collection of musings and multimedia related to each of my hobbies. I’ve been reading his site since the late 1990s and there’s still something new I learn or find every time I visit.