BSRC have released a 36mm Carbon Fiber Droop Block.
These were designed to work in conjunction with the new HB Racing Ride Height/Droop Gauge. (HB204327)
You can also use these droop blocks to measure your droop with a Vernier Caliper.
You too can now measure your droop the same as the pro's. Measuring from the height of your axle is 100% event left to right compared to the conventional way of measuring shock lengths.
Video on how to use the new Droop Blocks can be viewed here: https://www.facebook.com/BenSterlingRC/videos/2250053855221672/?t=0