you can get a replacement insert...

my buddy shoots an alumanum insert with carbon arrows. the guy at the shop told him he needs the carbon insert...

i still dont understand the difference. no matter what size the hole is, the arrow still just sits at the bottom of the hole. im about 99% sure that your arrow shouldnt fill the whole hole...i still say the shop was tryin to make money...he didnt buy it either. his thinking was like mine.

id check the tune...could be out of tune since you put the new rest on. also make sure your not getting contact on anything that you shouldnt be. i still think that you should be fine...my buddy shoots his fine...