An email from someone at Varizoom told me that the StealthZoom operates in 4 of the 6 speeds, leaving out the fourth and last.

While disappointed, I will still use it for shots where I dissolve to the zoom. I need something to use on the handle of the tripod.

Someone suggested a controller made by Zoe. I will report back if I get one.

Try the manfotto 522. It actually comes built into a pan handle and it's loaded with features.

http://www.manfrotto.com