We all spend hundreds of dollars on the best, fastest bows. Tons of time practicing shooting, stand hanging, etc. and then you want to skimp on the most vital piece of gear between a dead deer, missed deer or worse a wounded deer.
Don't be cheap about it, buy a spin tester. I bought one years ago for less than $30 and I have not needed another one. Once in a lifetime purchase if it is a good one.
Here is where I got mine:
http://cabelas.com/cabelas/en/templa...amp;hasJS=true