Apparently Matthew knows more about what I like than I know about what I like! I've never tried the Tanto blade design, and I really like it thus far. The ball-looking thing uses some voodoo bullshit to magically speed up and give a gyroscopic grip workout (my physics major roommate says "conservation of angular momentum".) A very cool twist on the traditional grip exerciser. I should have hulk arms by the time climbing season rolls back around. Thanks, Matt!