I have a 1999 60" Lazer Z. I bought it used and am having problems with the deck height. I have to raise it almost all the way up to get the blades 3.5 inches off the ground. Then when I hit a small bump the deck jumps up in the highest spot. Where should the chains be mounted, inside the frame or outside, inside deck bracket or outside. I am also having issues with the deck cutting shorter on the discharge side when Im on at an angle. New blades all the way around and spindles are all O.K.