"Devil blade" - gotta love it.
DaveO, making a detachable yoke with hinge and pins was something I got from reading an older post by Muskrat on this forum, so not a new idea, and I think Jim Dodd mentioned somewhere that he had done it in his early builds. Although I don't see it referenced a lot elsewhere, it is a pretty simple and effective solution.
I wanted the yoke ends to rest on top of the gunnels to bear most of the weight once the canoe is on your shoulders, and something that would drop the connection point below the gunnel top so there wouldn't be anything sticking up to snag on things when the yoke is removed. Found theses hinges with a 90 degree bend on one plate at Lee Valley - they are reversible hinges so made such that the pin is loose and easily removable, although removing the pins is not difficult to do on pretty well any hinge you could buy.
Mounted the flat plate to blocks made from the cut-off ends of the too-long basic ash yoke I bought, using t-nuts on the back side to let me thread some small bolts through the hinge plate, and shaping them so that they attached to the hull and wrapped around the gunnel from below for additional strength in the epoxy bond.
The other, bent hinge plates I simple bolted on the yoke ends, using stainless through-bolts and nylocks. Separately bought a couple of r-pins (or r-clips, or hairpin cotter pins - there's a million names for them) to replace the pins that came with the hinges. Still have to cut off the bolt ends protruding above the nylocks so I don't gouge myself, and it is a good idea to use a short piece of line to tie the pins to the yoke plates so they don't get lost, which I also haven't done yet.
J
With a little care to dry fit and align as you construct things, the yoke simply drops in with the hinge plates lined up, letting you snap the r-clips through to hold it all together. Almost instant on and off, and very solid attachment (sorry for the poor quality of the second photo below).
The hinges I bought only came in shiny stainless steel, so I painted them and the bolt heads flat black to tone things down. The paint likely won't last long at the hinge connection points but can always touch them up if it starts to bother me. I think that's about it - all the best.
Tony