Closing in on continuous behind-the-back throws

This month I'm trying to master continuous behind-the-back throws in a 3-ball routine. So far, the most I've done has been 4 catches. But I think I've got the process dialed in...I learned I have to throw the balls quite a bit higher than I expected to gain the time needed to free my hands for the next throw and catch.

I'm actually doing this mainly as preparation to do continuous behind-the-back throws with clubs. Oddly, on my first attempt at that, it didn't occur to me to work with balls first and it took a suggestion from someone at a Texas Juggling Society meeting to give me that little breakthrough. I mean, if I was telling someone else how to learn to do anything at all with clubs, I'd suggest that they learn the trick with balls first....but I didn't figure that out on my own, when it was me.

Of course, part of that is because I can already do individual behind-the-back throws in the middle of a club pattern, so I felt like I ought to be able to move forward from that. But continuous behind-the-back throws is a whole 'nother animal.