I forgot yours was exceptionally tight Matt. Up to you mate, your the one on the spot who can feel the pinch etc.
I don't like to run the extra shim too long myself personally, only for the initial 12 or so tanks, just to aid in starting when the motor is really new-tight (I think I just created a new word there ). Then I just take it easy until it feels right. Whatever works for you mate.

I do see a little niggle coming into the thread. I hope we are not going to let this take the thread on a downhill spiral. That would be a shame.