Thanks for the comments guys. I thought I would post an image to show the extent of the issue I am dealing with. The axis of the issue is aligned with RA perfectly. This plot was taken with 3 second exposures, I have tried a range of tracking rates including .5 of a second and there is no improvement, in fact it makes the dec tracking a lot worse. The issue is persistent no matter where in the sky I am pointing. I ran PEC and it still has the same issue. The only thing I can think of is that it is caused by the addition of my counter weight extension bar but surely it shouldn't cause that much of an issue.
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