You could have found this thread in the search:
http://www.airsoftcanada.com/showthread.php?t=2021
Yes, I was the last to respond, back in 2003. Another tip, be careful not to overtighten the screws on the grip, otherwise you can pull the nut right out of the frame and will have to resort to ABS glue to get it back together again (if you don't have the metal frame M9).