Spin testing

[nhbuck1]

I've read about spin testing broadheads but nothing tells me how to fix a head with carbon arrows, I'm having a hard time with this.
Thanks
Kyle

[olddogrib]

"Spin testing" actually covers several methodologies, but if you're referring to a device such as the Dixon aligner 3 Rivers has a video on their site on how to use the device (or similar homemade ones)  This relates to aligning glue-on heads that you're mounting on  screw-in adapters.  Screw-in heads should be straight right out of the package.

[nhbuck1]

I also hear the o rings help correct? What size do I need I'm just confused how to fix these.

[olddogrib]

I've never heard of o-rings fixing "alignment" issues, which is the head ferrule/tip being in alignment with the shaft.  O-rings are useful with blade orientation issues, where one prefers a particular orientation of the blades in one's sight picture, i.e. horizontal vs. vertical.  Either issue can be addressed by using carbon compatible hot melt on inserts and adapters as opposed to more permanent adhesives.