I've been training grip for a few years with GD80 and GD90 adjustable grippers for sport (badminton), and after watching Larry Wheels & Ivan Cuk video during Christmas, I ordered few COC's. While I closed #2 out of package, #3 and #3.5 seemed impossible. Now I can do 5-6 reps with #2. Since I couldn't get #2.5 (I'm from Europe), I ordered Robert Baraban's 210, 260 and 300 with 210 and 260 supposedly between #2 and #3 according to cannon website. I was hoping I could close at least 210 out of