shortening benelli m2 stock

[brotherhef]

For me the benelli m2 length of pull is too long. I have done some research on shortening the stock. I also heard c-rums and benny hill does it. here are a couple links of people shortening stocks. What do you guys think about doing it on a m2?
http://www.hkpro.com/forum/showthread.php?80819-Shortening-the-Benelli-Tactical-Stock-%2596-a-la-Ned-Christiansen
http://www.brianenos.com/forums/index.php?showtopic=116328