I'm considering changing my current Record chainrings from 39-53 to a 42-53 using either a campag 42 or a TA "campag compatible" 42 ring. I am also considering a 44 and 54 or 55 for TTs. Again these would either be Campag or TA. Has anyone had any experience in changing to similar combos with non original equipment? Any problems? The actual changing is easy as. I am more cocerned about shifting quality and smoothness etc.