I've not been able to keep them on anything long enough. I'm one of the few special people here who can't get along with them. After few minutes of playing my fingertips begin to get sore and hurt. It's not from the texture, but the plutonium 238 that's in the cobalt.

They are bright for a "flat." You might need lard. Another option would be GHS Pressurewounds. Pretty similar in sound. Likely as close as anything I can think of. Less upper clanky tones, but great mids (alloy52) and lows. Possibly the best all-purpose string IMO.
There's a special club for the special people. The princess fingers club.
View attachment 4586491