Yeah that video helped me understand the bump steer gauge and was the deciding factor in me buying it.
You can also add another dial gauge from Longacre to the other side of the bump steer gauge and measure the static toe along with the bump steer.
I would also like to add if you attach a level that attaches to the hub with a magnetic base or some kind of adaptor you can measure dynamic camber change on compression and droop.
I have a Craftsman digital level and used a steel 1" x 1" x 12" L bracket with a bunch of rare earth magnets and I can attach it to the hub center and record the camber change. The camber isn't the actual amount but it helps to measure the relative change of camber through the suspension travel. I am having custom adjustable lower control arms made where they add more positive caster, I can also adjust the roll center and length of the arm to correct the dynamic camber change, and it will give me more static negative camber. With my current setup at full compression I get positive camber even with -2.0 degrees static camber dialed in with camber plates.
Would also like to add I am digging this forum as we can have discussions about advanced suspension tuning and not have people asking what is the best drop or the best coilovers to use.
Maxima.org is a bit behind on all this suspension stuff.