So. I have a set of Ritchey WCS cranks. The non-chainwheel side was recalled, and replaced (swiftly) by Ritchey. Photo here. (yes, it's rusty) So then I had the task of removing and replacing the crank, which appeared to have rather normal looking self-extracting bolt business. I turned the bolt counter-clockwise, it loosened for a bit, then became more difficult to turn again (as the bolt engaged the cap/dust-cover). I kept turning and heard a noise as the cap/cover cracked. I turned a bit more, and the whole cover cracked into bits. Photo here. I removed the bolt and was able to unscrew the threaded part of the cap, which was still in the crank.
(1) Did I do something really stupid or obviously wrong?
(2) Has anybody else had this problem?
(3) I have a old-style crank puller, which is too small for the octalink BB. Can I jam a coin or something in front of the puller head, or will I destroy the BB?