You are absolutely right a 12 pt hex/ or torx will work wonders.
Something else I discovered after fighting with a corroded water pump bolt
on an old ford van. That even after it had broken off leaving only a little
stub when w.pump was removed, I beat a super tight socket over the rusty stub
and surprisingly it came out.
In fact the piece of bolt still is stuck in that socket to this day. Note: A
screw extracter would not work,only kept breaking of pieces of bolt making me
sweat even harder. Ofcourse now everything is metric and hex due to the 4 vws
in my yard.
Good luck
Mike
89gti 16v
89jetta 8v
89 golf gl 8v
87gt golf(yard ornament&parts)
00 jeep wr.4.0