I have a Specialized SX Trail that I use for downhill racing. The stock 66 that I have now just isn't cutting it. I also have a 07 boxxer race that I would like to run this coming season, but it has too much travel. How exactly do I lower the fork to about 180mm? I have done some research but have only determined that I need to add all travel spacers and cut the springs down accordingly. Do I need to do this for both legs of the fork? Also, where can I get these spacers- do I buy them from Rockshox or can I get something comparable at a hardware store? Any words of wisdom or advice would be appreciated. Thanks.