Obliged to post; Mounting of bench vises.

[Moby Duck]

I mounted one correctly as above but then fitted several drawers underneath the bench, immediately below the vice. What a disaster that was. If top drawer is out it fouls the vice handle and if one drawer is even slightly open, most of the filings etc seem to end up in the drawer. I used heavy 'coach screws' to bolt it to the bench and it hasn't been a problem. If it ever did loosen it could be easily tightened from the top side without having to get to the nuts under the bench.