Today, I received and set up a relatively-inexpensive follow focus system for the edgertronic high-speed camera. The follow focus is the EzFoto Fotasy, which includes a follow focus and 15mm rail system for $278.99 shipped on Amazon Prime. The packaging is nothing fancy, but it feels really solid for the price. Also, it has 20 reviews on Amazon averaging 4.5/5 stars, which is a good sign. One thing I really like about the Fotasy system is that both the bottom tripod mount and top quick-release clamp are Arca-Swiss / Really Right Stuff compatible. The RRS B76 Multi-use fore-aft plate fits perfectly on the bottom of the edgertronic and works well with this rail system's QR clamp.
The Fotasy follow focus adjusts quite a bit for height, but doesn't quite make it to the edgertronic's bundled 50mm Nikon lens. If the system's QR clamp were half a centimeter closer to the rails, it would just work. It's easy to get a replacement top plate for the rail system, but I just put a few rubber bands on the lens' focus ring, which put the gear within reach of the follow focus. Problem solved—at least, for the short term.
The physical stops on the follow focus are also fantastic.
I think it's a great setup for the camera.