We have a couple different seats of solidworks in our office.  I was wondering if there was a way that you could change the sensitivity of mating.  Say I draw a component with a 2.437 b.c. and a co-worker draws the mating part with a 2.438 b.c. and when I go to assemble them I get an error.  This is very frustrating and I was wondering if there was a way you set a tolereance or something so solidworks would mate the parts correctly?