Hello members, firstly I just changed out the dreaded fox float air shock on the rear of my '15 stxdx, wow I wished I did this years ago!! Changed it to a MTX coil over gas from the same year. Okay what I would like to know is from experienced drivers is this , I installed a front or center shock from bill mohr seemed very stiff and have seen on posts that it can cause the shaft to actually bend! Now there is a progressive spring from hygear, have any used it? Also with the rear shock change I want to go with hygears linkage system, anyone have experience with the kit?