I bought a used Flight-Rite spine tester a fews weeks ago and have no instructions. I think I have it put back together right, but not sure how to calibrate it and use it right.

Might someone have a copy of the instuctions that I could get a copy..........Please!

Try a search for Ace Archery Co. They do have a website. Contact them and see of they can email you a set.

It is precalibrated. Just put in a shaft, zero the scale, and drop the weight.