I will probably be embarrassed when I get the answer but in assembling my UCA arms I can't figure out how the end caps work. THere are very coarse threads on the pivot but on the threads going into the UCA, the threads are quite fine. Seems that unless there is an inner sleeve on the cap that is supposed to spin independently, its not clear to me how to install the second cap with the different thread pitches.
What am I missing
Thanks,
M