Go with GB springs if you really must have Paras. I myself am happy with standard springs, they took a while to get supple as follows. Jack up on chassis to let springs fully relax,clean with wire brush and maybe bash em with a hammer if really rusty, spray with oil/paraffin. Drive around for a week and do em again. Drive around for a week and then jack again on the chassis and use spray grease with a nozzle tube to get in between leaves. Drive around and repeat a couple of times then do every 10/12 weeks with grease. Total cost about £6 for grease. Mine lifted about an inch or more and rides well.