Eric,
MAGNETIC 'V' BLOCK UNIVERSAL VISE JAWS
Aren't those sweet? Whit put me on to those, very useful.
That vice is self centering and that really is a big help also.
Woodstock D4064 Precision Self Centering Vise - Amazon.com
the price seems to go up and down, I thought it was $149 a while ago.
cheers
andy walker