....couldn't resist adding a comment regards the the F1 car weighing saga over on the the other side. The rule seems fine to me it just needs a little better execution on both driver and stadium owners parts. I believe all stadia are required to have a dedicated level concrete area for weighing cars.....I think only Buxton fully complies on that score. The drivers themselves know they fly close to the limit and should have their car weighed prior to racing if they want to be sure they are not going to be excluded (this means setting the tyre pressures to the predicted hot temperatures when they come off track prior to being weighed/making sure there's no play in the panhard bars/making sure the wheels are not buckled or egg shaped/fluid levels are correct ect.)
The place where the scale pads are placed should be checked with a laser level to ensure they are within 1/8" of each other maxiumum (and shimmed if needed with something that does not compress) each scale should also be checked to ensure it gives the same reading using a test weight.
If a driver is found to be over the 52.9% left side weight limit then the car AND all the scale pads should be rotated through 180 degrees and weighed again and a average of the 2 readings taken as the official reading.