I read an article in Acoustic Guitar a few years ago about David Wilcox (not the "Riverboat Fantasy" one, the other one) where he described how he sometimes cuts off the end of a Kyser capo and carves away the rubber whereever he wants a string not to be stopped. Creates some open-type tunings that way, with special characteristics because, of course, the finger positions on the open strings don't change and it can provide for some unique arrangements not playable any other way.

Apparently the folks at Kyser picked up on it and started marketing specialty capos hacked up just this way.

Reminded of the time when I and another guy by the name of Clinton Hammond figured out a way to play Garnet Rogers' version of Lui Collins' "The Enfolding" using 2 Kysers, one of them only stopping some of the strings 2 frets up from the first. Took so much fiddling around trying to get the capo from not popping off halfway through that I gave up on it. Can't remember how we did it now. Cutting one of my Kysers down would have solved that problem but I ain't rich enough for that kind of shit just to play one song I wasn't that crazy about anyway.