Rusty used to use the same pack for 4.5 and 6.5 lift, just included a 2" lift shackle (I think). Might try using a shorter 1" or 1.5" shackle if this is still true. My 4.5" springs are fairly soft and will sag under much load. I guess if you always run empty, no big deal, but once in a while I tow the boat, or load the back end down with tools, parts, and camping supplies. They are plenty soft then, and sometimes I wish they were a bit stiffer. Use you own judgement, but given my experience, I wouldn't recommend removing any leaves.