All very interesting posts.

One last question though - is there any striking, visible difference between the post '77 cranks and the pre- CSPC/pre-'77 cranks? I've heard that the arm was placed farther outboard to clear the CSPC-mandated derailer lip, although on the two cranksets that I have (one early, one late NR), I don't seem to see any particular difference.

P.S.: Might as well put my shameless plug in here: I need a pair of NR crankarms. Post '77 preferably. 170-175 OK.

-Kurt