RvRoamer, I wouldn't rate this as a fantastic test of anything. I mean nothing rude to the poster or maker of the test. There is no accurate ground balancing or machine stabilization taken for this test, the black top surface the boards are on don't help and you can't possibly know whats under the other boards. Also each machine is using a different coil. The trouble with this kind of test, is the one machine would probably hit it going the other way and the opposite machine would not and vice a versa. So much depends on the program of the machine and most important "the coil" The industry and private reviewers will do a type of X board with nails and usually two or three pennies through a pattern with iron nails or some iron target with the pennies in key locations. This is a test for tracking, blee is right heavy iron is very difficult to find targets in.
This is why its recommended to cross the locations several different directions, one trip length wise then across or side to side, point being, change the direction your going to change the angles the coil comes across the ground at. This helps free up the target zones.
You'll notice as he moves the coil slightly different with the CTX and he hits the target at 1:20 or there about.
Good luck!
Stay Gold!
Opie