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