Hey guys, question.

Say I want to upgrade my crank. Right now I have a square taper cartridge type BB (shimano). I'm upgrading to a hollowtech II BB. Do you think I should really face the bottom bracket shell? In other words, how common is it for the shell faces not to be square with relation to the threads? I don't have the cutting tool to do it, and it's expensive.

Some more information:
- cheap alu7005 frame (Ridley Ignite A30)
- same frame is also sold with SLX cranks on a higher model (A10)
- about 6 months old, BB has never been removed

Input greatly appreciated.