Gavia,Thanks for the kudos, folks. It turns out I made it too long. So today I put more holes in the yoke end to create different balance points and cut off the excess length.
Stripperguy, I don't understand about putting the seats on your pack or head. Do you do a two-person carry? Either your boat is awfully heavy or the center-thwart-portage-yoke idea hasn't reached your part of the country yet.
I still go with simplicity for my solo's. I drill a hole at the neutral balance spot on each inwale and attach a regular yoke with a bolt and wing nuts. Very light, very simple. I guess most people just don't want to drill holes in their gunwales.
Glen do I have the correct visual? After removing the yoke at the end of the carry you move it back behind you and reattach it?