They have since come out with one that uses only one cylinder and a 3 to 1 lever for $500. However, my machine has a spindle encoder which would get in the way of their device so I would have to rework it anyway. Tormach's unit has a clamping arrangement where it does not load the bearings. This one presses down such that the bearings see the thrust load as the spring is compressed. They say the force is within the range of the bearings, but I would want to verify.

I understand cost of product development,... My machining activities are a post retirement hobby. I get more pleasure making tools and tool accessories than in making stuff to go out the door.