When looking for a vise would I be better off getting an 8" vs a 6"? I am looking at a Vertex brand 3 jaw front mount and the difference in price is about $50.Here's another pic showing how big, or should I say little, the gap is on my 8". The gap does not change whatsoever when rotating the handwheel assy to disengage/engage the worm on mine. Sorry, my aching back doesn't feel like pulling the thing out of the drawer right now to take a proper pic.
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You said you prefer to mount your chuck on an adapter plate. Why is that?