Don't know if this is a problem or not - I have an EA70 O/S Stem on marzocchi bomber forks. The steerer is cut correctly to the right height for the spacers and stem etc. To get the stem tight enough I am having to tension the bolts up such that the stem actaully completely 'closes' round the steerer - i.e. there is no gap whatsover at the back, betwen the bolt flanges.
I am thinking either the stem is slightly too 'large' in it's steerer hole, or the steerer tube is a touch too narrow in diameter.
Is this a problem, or should I just tighten up and forget ? To do something I would probably have to change the stem to something of a slightly different design, Thomson or similar