Thanks everyone for comin out. he is a couple of my videos from the match.
http://www.youtube.com/watch?v=8-r21ykzZnU
http://www.youtube.com/watch?v=6nEjS9ZNdLA
http://www.youtube.com/watch?v=t01o1jcM2Sk
According to the book I read "Glock's in Competition" The reasoning for this is to improve the trigger pull only. If you look at you slide when you pull the trigger it jumps a bit when you pull the trigger. This will take some of the jump out of it and give you better pull. I have done it to mine per the instructions in the book and it does make a difference. It's not for the faint of heart as your hitting you slide with a hammer. Hope this helps.