i have .75 sonic springs. i think it came with instructions that i promptly threw out. the springs are shorter than stock so it comes with pvc to make new spacers and new metal washers to go between each section... i like the washers they give better than the oem washers in the fork so i used those instead. the springs with heavier oil really was a very noticable difference. but with the front setup correctly it really highlights the rearend... time for a new rear shock i think :P i run the R1 shock which is dirt cheap and easy to work on... but you have to use the r1 shock knuckle and make your own links if you want to go that route. but only doing one end of the suspension will definitely make you wish you had done both
front without rear isn't as bad as rear without front