Hi, Michele! Glad you can get some use out of my blatherings.
Another suggestion:
In your other workouts, including step, kickbox, and hi/lo, consider sprinkling in just a few power scissors here and there in lieu of other moves. I like to do this during the 10-10-10 hi/lo segment when Cathe is doing fast mambos or grounded travelling moves. But you can really pick any spot you want, and just do 8 (each leg) and go back to the choreography.
One of the things that makes the I-Max power scissor interval, as well as the CTX Kickbox power scissors sequence, so challenging is that you do about a gazillion of them all in an unbroken string, and that can be a real shock to the system. Sticking in just a few here and there in your other workouts can keep the legs "power-scissor oriented", and can serve to build your leg power for that move and others.
HTH - keep up the good work! I remember when I thought "I can't do these" in interval #8 in I-Max 1; now I can do that entire interval and add on 8 complete sets (each leg) at the end of that interval. Again, they're worth the effort.
a-Jock