Interesting, where did you get it or what did you base it on?
I’d guess all the grippers are Heavygrips judging from the poundages.
I have a variety (COC, RB & HG) and have found the HG season badly (i.e. a lot).
I don’t think grip training is, or should be, easy - simple maybe but not easy.
I have found the KTA program to be superb for results, but it is definitely NOT easy.
i basically made a little program out of what is said in the little article. I dont know who the guy is but he seems to be a strong man i mean it did say he competed in many events and all.
oh and i dotn use mixed gripper just with the springs at the top, but mixed grip is a great idea.