Yes, a little off perhaps... Do you have a defocused starfield? I find the best way to check collimation on mine is with a bright central star and then an open cluster/rich field to check the 'balance' of the image. Intra and extra focus. doughnuts should be all squished the same amount and look the same as distance from the center.
Central star doughnut must be absolutely perfectly centralised. Usually the primary needs adjusting on these to get the airy rings balanced.
Also, what moonlite do you have? I have the 2 inch and my drawtube is off centre. You can't collimate the drawtube on this one, only the 2.5 inch version. I correct this slight misalignment with the collimation ring.
Have you also made the primary baffle tape-fix to stop the primary mirror moving?
Tim