No problem.

I think that the allum arrows are gripped better by the springs (on the shaft) then the graphite. I have actually bought the size too large( could not get correct size) and with needle nose pliers did some bending and had them work great. I actually believe that they were tighter then the correct size,

Actually when I first researched arrow arrestors, rubber bands, washersm o-rings where what alot of people used,

Good luck and talk to ya later.