Looking forward to reading about the ride but I'm with posts 2 and 3; I like the idea of a flip flop with a freewheel for climbing on one side. This is how road racing was done way back in the day or with freewheel on both sides. In any case, I think those road racers way back in the day were on to something. There's some info on this in Hearts of Lions which you might enjoy reading
Robot Check
Here's a blog post,
Flip-flop fixed wheel gearing - Road Cycling UK