Then I went back to the stiffer springs when I fitted the TJM bumperWugg did have a diff drop kit fitted for a few days, Chris posted me the kit to try out. I had fitted the stiffest OME coils at front and got strange driveline vibration, the diff drop kit didn't cure it, so sent it back to Chris,
I replaced the springs with next level down in stiffness, which lowered front down a bit and problem solved!