I also recently picked up a new droop gauge from PowerHobby. It comes with the small wheels you thread on, pair of 10mm blocks and a two-sided gauge. I used to use the Avid circle gauge, but measuring under the arm on my MTC2R I got erratic numbers. I am really liking this new way of measuring the droop. The only issue I can see is if folks post setups and have a different brand of gauge. The PowerHobby and T-Works gauge comes with 18.50mm wheels that thread on. Buddy of mine has the Aerox gauge and he said his wheels measure 18.00mm so when comparing settings they are 0.25mm off from one another.