I've got an old early 90's sealey 100xt mightymig I'm trying to squeeze some extra life out of, the earth clamps a bit knackered and the lead is only 1.3m long so I was going to replace it but it's got a crimped connection as in pic. Is there an easy way to replace this? I could just leave the lead and replace the clamp but a bit of length is always much appreciated, or so I've been told.