Originally Posted by chase.

the messenger crankarms come from the early RD2 mold, which appears to be free from the recent problems with the RD/RD2 where the 103 sugino BB doesn't work.

the zen messenger ring is plenty stiff, but it is a little noisy. it does come in more than 46 and 48 (i have 44) and may also be available in odd teeth. or you could try the CNC'd ring from FSA if you don't mind the huge logo.