Hi Doug,
Thanks - interesting !!
The twisting under load thing is also interesting and is an issue for a lot of these F3A bipes.
There is very little section taper in a lot of these and they twist very easily.
I have been modifying the strut mounts on mine ; 1. to set the tips better and 2. to give more hold on the set.
I think there is more that can be done with strut design in this regard.

Brian