Mixja

Right, after getting mugged off twice buying 2 sets of buckled super t's by people describing them as excellent condition, I've decided I'm gonna keep my 7 spoke softlines, but I need to increase the offset slightly...
Anybody know anywhere in or near Essex that could machine a few mm off the hub face, and also, how much is it possible to take off without affecting the the structure an strength of the wheel...??
Any advice most welcome please as I'm fucked off driving a car that thinks its a kango...
Thank you peeps...