I am kind of concerned about potential added flex from stacking parts.
I second this concern. By (permanently) affix I mean TIG weld the parts together. To make a
first class job of this some preparation of the parts (preferably by a machine shop) is needed.
The engineering literature does contain some guidelines for developing vibration dampening
and/or flexure minimization between two mechanical elements employing various elastomers.
However, I've never seen any suggestion that there is a "one size fits all solution." Should
the mass of the load, or the relation between say the plate/clamp/camera/lens assembly and
the center of gravity of the head change it is indeed possible that simply screwing the plate
onto the clamp with its' (probably) buna rubber strips could cause problems.
For what it's worth, if I recall correctly, some years ago someone in Austria actually made a
number of replacement top plates (not the camera plate) for Sachtler heads that incorporated
an Arca Swiss style clamp. I no longer have this link and cannot find the source.
There is nothing wrong with the Wimberly C-30 clamp if it is used on a FSB 8. The knob on this
clamp will interfere with the top plate of the larger series heads (DV 12 and larger plus the old
DV 10.) I can't speak to the FSB 10 or 10 T as I do not own either of these.
Bob