Alan, your wheels look great, and personally I like the greenery on the drive. However some might dock you a couple of polisher-points for not getting your bolts painted black to match the wheels ;-)
Chris F told me about positioning your locking bolts opposite the valve as well (when I was in having damptronics fitted last year) and I've followed that advice while taking trouble to position my centre-caps so the Porsche crests are fashionably off-kilter and don't point anywhere in particular.
Call me a pedantic old git but in practice the position of the locking bolt relative to the tyre valve has no effect on wheel balancing, which is usually done off the car (so with no regard to the car's wheel fastenings), and which already compensates for the weight of the tyre valve.
Just to hammer the point home, a locking wheel bolt off a 997 weighs pretty much the same as the matching-length hex wheel bolt, but even a 10-gram difference between wheel bolts would only make a gram or two's worth of difference at the wheel rim, where the stick-on balance weights only come in 5-gram increments.
Knowing Chris I think it's just about being systematic: if you know where your locking nuts are, you can put your locking key on the locking bolt without a second glance, so can get your wheels off that little bit quicker...
... that and he's got a sense of humour
