Great build! Very clean work! One question, do both of the cooking grates move on the same axle? If they do, wouldn't it be better to put one (the larger one) as a solid axle (1") and the smaller one as a receiving axle (maybe 1-1/4" pipe), allowing for independent adjustment for each grate?
500 gal. Carnivorous Spirit tank smoker, 22.5" weber, UDS, 1 gas weeny warmer