Sure thing, all you need to do is go to the seller's post on that shaft. Hopefully, you left a message in there. If you did not then you will not be able to leave an itrader. Assuming you did, once you are in the post - under his name is the itrader and next to it is a number that you should be able to click on. This will take you to his itrader. There you will be able to leave him a feedback.

If you have any trouble call me and I'll walk you through it

Hey Chris sorry to bother u but a bought a shaft from an azer and i would like to leave an itrader for him but i don't know how was wondering if u could send me a message explaining how thanks,Fred

Hey boss I sent you a PM asking for the wieght and if it is a 3x8-10 Joint? Sorry if it did'nt come through