>> I just had an idea today for a self-centering vise stop.
> Looks like a good idea, it could centralize the work quite well.
>
> What would happen if you got rid of the gears and placed a centrally pivoted
> vertical member in the centre with a tie rod from either end to the ends of
> your L shaped members. If this was practical to use it would perhaps save
> on a couple of gears etc.
