Hi Ian,
Thanks for taking some time over this, but given the concerns raised by Chip, that design looks like it is still relying on the four bolts into the alloy taking the weight of the car. So is still subject to the same concerns?

The actual design of these mounts is from three individual pieces to allow the part that supports the damper (the central piece) to move in two plains. The way it is designed is that the weight of the car is supported by the four bolts that Chip has high-lighted and these are threaded into the alloy mount (almost as per your drawing, but the thread goes all the way through, which would enable you to screw in a bolt from underneath the platform and OE strut top, so that you have a clamping effect) .

Chip,
Regarding your idea of a stud, could you clarify what you mean, as I cannot visualise how this would offer any clamping from underneath, unless a nut was put on it, and if a nut was put on it, then how would this be any easier to undo with the struts in place (remembering that the alloy top mount is threaded)?