this fork sucks.

so i rebuilt my cb550 forks. im pretty sure my springs are totally clapped out. there is about 1.5" of sag when i unweight it and then let it drop. then when i sit on it another probably 3/4". i put a zip tie on the tube and it bottoms pretty easily under moderate braking. and i have noticed it sometimes crunches pretty hard in some of our nice city potholes. im running 145cc 10 weight. like the book says. how much of a difference are my new springs going to make??? anyone??? or will it still have that crappy mush feel?

jc