Hey Quick,
Since you ARE the "resident g sarcastic critic", and never DID get a straight answer, thought I'd pass this on to ya...these guys make a "semi-custom" locking cap for BWM's...'bout $20.00, or 2 gallons of premium !!
http://www.autosportcatalog.com/inde...d=4741&sc=5024
~ Lemme know if this helps ya any...

__________________
MauiKat
"Life's journey is not to arrive at the grave safely,
in a well preserved body,
But rather to skid in sideways,
totally worn out, shouting,
"HOLY SH*T - WHATA RIDE !! "