I get my info from Forums , from 1 guy i met on the forums that i have talked to by email and phone , he has been a tremendous help (the Dogger on TT*Brian Rewers*great guy with tons of info) , i also went and got Race Tech Gold Valve Kits , mainly for the completeness of the kit and they have excellent Tech Support , did both my 02 CRF450R and my 06 CRF450X with the kits front and rear , i am very happy how they turned out , the R i had to redo several times to get it the way i wanted it , but i figure i learned a lot by doing this so my second bike was much easier and went together without the need to redo the stacks , i also bought a Nitrogen Bottle and gauges , so that makes life much easier , as i can tear the shock apart whenever i want without worrying about not being able to get it recharged quickly