RE: Thin Arrows
When you change to a smally diameter arrow it effectively raises your nocking point because it sits lower on the rest. You will probably have to lower the nocking point or raise the rest a hair. I would should it first to make sure though, it might be ok like it is.
You for sure do not want a larger tip than the shaft is for certain types of targets, like bag targets and some indoor ranges. The local club will not let you shoot tip larger than your shaft because they are made of some sort of mesh screen. Some carbons there is no way around it because the insert actually flairs out from the shaft. If I remember correctly carbon Impacts are this way, and my buddies new PSE arrows are as well. He has a heck of a time getting them out of my bag target.
Paul