Phil and others, around mid February I purchased the CofC T, 1, and 2. I had the same questions as the OP. I have been GTG with my grippers. When I first received the grippers I could not close the 2, however I could do 2 reps with my right hand, 1 rep with my left han with the 1, and 5-7 reps, bilaterally, with the T. Last week, I did 1 rep, bilaterally, with the 2, and didn't try for more. I use both the T and the 1 while GTG, 5-7 easy reps with the T or 1-3 reps with the 1. Sometimes I invert the gripper or do 3-5 second holds. I tried a few "slow-twitch " 30-60 second reps for experimentation, but I am not sure if slow-twitch training even applies top grip strength. Basically, I'm just having fun with my new toys. I keep them in my desk at work and just pull one out and have at it, any way I feel. Not too regimented, but fun!