Dave Polaschek
 Nice, Mike! Now do it again, but start from a piece of firewood? 
It'd be nicer made from firewood - all the firewood around here is silver birch :)

If (well, OK, when) I make another one like this, I'm making the bottom screw the same thread as the top, threading the bottom opposing chop and putting a handle on it so I can spin it like a parallel clamp. It was about half way through the build when I thought Hang on this is just a parallel clamp with 1 long arm and some bling, The garter and jaws are a nice touch, but it's just the extended bottom of the chop that makes this much better to use than a clamp.
It's a good prototype for what will work and not work in the full size version, but for this style that clamps in a face vise I've spotted enough things while building it that means I'll be doing a new one in 6 months or so.

RyanGi
I do remember the turning saw run..made one myself as a result!! Good stuff… 
If I remember right, Dave started that one off.