That was much easier than the crotch reduction surgery. I used the rotary tool with a point that resembled the tip of a .22 caliber round. The part to sand/file/roto-tool is the back, not the head. I didn't see any links on that. It's my son's birthday, so I'm home form work. Let me see if I can post a "how-to" picture in a little bit. One down, 5 to go... But my first one has full range of neck articulation now. I might go buy another Viper pit pack before my TRU is sold out...again.