I have searched endlessly on this subject and I know i want a regina orn6 chain. For front sprocket i was looking at the moose chromoly and the pro taper chromoly. Has anybody had experience with either of these? Also I would like an ironman rear but it has to be a 52 tooth and msr does not have one in that size:banghead:. Does anybody carry them in 52? Also I have heard that ironmans are now made with a full ring in the sprocket center, instead of small tabs where the bolts are, but msr does not show them like this. And last but not least, has anybody had any problems with the full inner ring ironmans (such as bending or breaking like rumors said the old style did)? Any input apprecated.