I will try to explain this short and sweet. I have a 2010 cannondale supersix with cannondale hollowgram SL's replacing the chain rings and just ordered some praxis rings. Now this is my winter bike so it's not my main bike. Now I also have a 2013 supersix evo with the new hollowgram SL's with the mk5 chain rings with maybe 1000 miles on them. Now do I put the praxis on the evo and transfer the mk5's to the old supersix. My new bike shifts awesome but will I see a difference to put the praxis on my main bike? What would you do?

I use praxis simply amazing. I would have it on my main bike.