I just tried to install a TM Designworks 2 stage Chain Slide-n-Guide chainslider on my 2006 YZ450F. The top hole matches up perfectly, but the bottom hole is 8 to 10 mm short. Anybody else have this problem?? I tried to call TM Designworks, but they are on vacation from 12/19 through January 1st. I think they may have put the wrong part in the bag.