Sigh. it nevers ends.
I have to get this dust cap off to get at the BB. (not my bike originally. I didn't do it.)
and it looks like a mess
I am soaking them hoping I can get a flatheaded screw driver in there (I seem to see a slot) but does anyone else have another suggestion? these cranks are disposable.

Try to get some needle pliers to grab enough hold of an edge and try to turn

There is a tool called an "Easy out" that is designed for this.
Harbor freight has them.
Tap it into the hole and unscrew. Works every time.

Enjoy

for get it. got it.

trivial really. sorry to waste space here.
Liquid wrench plus slightly offsized allen key.

but I would still love help on that darn jammed adjustable race.

i'd get a dremmel and cut a little more of a slot, then use something like a quarter and a pair of vice grips to turn it, you want to make sure you use something as wide as possible and try to turn it out. Otherwise you're going to have a hell of a time removing the crank bolt/arm