I'm learning a great deal myself and I appreciate this resource enormously.
Thanks again to all who have commented.
A colleague reminded me of the very clear depictions of clamping in the notch for tsvs fxs that appear in Tile's textbook chapt 32 as well as in Letournel's text.
I was confused what was meant by "through" the notch as opposed to "in" the notch, as depicted in Tile's text ch 32. I guess this comes down to semantics.
Also, I am very tempted to try this transverse PW Fx in the prone position. Will let you know how it goes.