no wait, i was thinking wrong, locknut is new... i was thinking of a c-clip which now that i think about it i'm thinking my first trompo bearing was orings, and then a few years later i think i got one or two with c-clips in them... i don't have any trompo bearings with lock nuts, but
if it's the same setup as my new qs-hybrids, and i don't see why it wouldn't be: i wrap a paper towel that's been twisted into a rope around the tip and then either hold it with a pair of ten inch linesman pliers or use some vise grip pliers on the towel and then i use another pair of pliers to take off the nut totally simple... very similar setup to s8 tops.