Played around a bit more with the spider capo last night, re-creating that E-based partial-capo configuration I described yesterday.
It really seems to like mixolydian scales. Here’s a quick recording of some chordal scale noodling, playing with both myxolydian and true minor. (Mono, raw mp3.) I don’t honestly know whether “it” means the capo or the chording created by the capo in this specific usage, though I of course suspect the latter.
I got less fretwear buzz last night mostly through fiddling, but I still need to get those frets replaced. There’s no way around it.