Thats awesome man, what do you they measure (do you know how much they've grown with this method)? I'll definitely give this a try when I get back to school in 2 weeks and can load up the smith machine. 30 seconds is pretty low, different than what I usually try so I'll make sure to do that as well. Is that all you do now for calves or do you do something else afterward?
I had to stop squatting because my spine is screwed and can't take the load but hopefully the smith will be different because I imagine you get up there with weights on this exercise.