But the spindle IS a separate piece, no? What about warranty - would a company (RaceFace) be able to replace the spindle? The rest of the set is pristine. Can the crank arms be removed?

Coil insert - Helicoil? Hmm, again a bit delicate for that, but I will check their chart and see if I can order one. I've used them before on motorcycles.

Cheers