after getting a bargain price for some Audi alloys to replace the 5 spoke ones on my motor now. got 2 off and replaced with new ones, came to the 3rd and I couldn't get the locking wheel nut to budge (not even 1mm). tried it on the next wheel and heard a little crack and to my amazement I've managed to crack the outer rim of the locking wheel nut. so I'm now left with the star like pattern in the center. I have tried locking wheel nut removers and stud extractor to no avail as I can't seem to get any purchase on the actual locking wheel nut. Does anyone have any idea's on how I could remove these?