Please don't think that im trying to be controversial, but as some one who will be a marshal at the EAST DEVON GP in August without getting very close to some one kneeling how will "the marshal" see if the bag is touching the forward leg. Or where the glove ends and jacket / shirt starts.
I may be wrong but I feel the position is to precise to be watched and lee way is needed. And yes give and inch take a mile.
Only my opinion.