We got a crank tool today, which let us reverse the rear gears, and get our prone bike rideable. It takes some getting used to – and isn't quite as comfortable as a normal bike – but it's a lot of fun.
We've been busy in the last week, and have got a couple bikes closer to finishing. First is a prone bike. We need to get the chain attached still, and need to reverse the back crankshaft for that to happen, but it's otherwise finished. Secondly, we took a trip to a junk yard and found both gears and springs, which will let us finish a backwards steering and a spring bike.
We painted the first bike over the weekend. It's now a very bright red. It's sticking pretty well, though we might consider adding another over-coat to keep it from chipping.