Hello everyone. I recently purchased an '09 KHS XC 204. I wanna do something to mine. I am relatively new in the upgrading department. I bought a fox float rear shock. I dont know what "eye to eye" means, and i end up doing my measurements and the closest size was 6.5", is that correct? besides the eye to eye what other measurement do i need? and also is the size for my seat post 31.6? And will you guys tell me more about upgrading my fork and rear cassete and deraileur( My current one is 11-34t)