If it is a 2002 it is most likely a U groove however many pros I know replace their wedges a few times every year...for us mortals it may make sense once a year...

Just my two cents...good luck!

The grooves have such prevision when milled from the factory, I would think you would have much better results buying a new wedge than attempting to re-groove an old one. The new TX4 grooves in the SM6 wedges are great, I even compared them to some new pre-2010 grooves on some wedges I have and they held up quite well in comparison. It is really the technology in milling he grooves and their design that makes the big difference, something you can't really replicate with a re-grooving tool.