Bike.1 tests OK, so I made a waterproof covering for the wiring out of an old oilcan and duct tape.
I'm planning to go out to Oundle tomorrow. I've been there several times before, There's an izaakwilson series Barnwell and Back, with 65 caches, plus a few extras. I'm taking bike.1, and I hope it works!
With a long series like this, I like to do it as two parts, but I can only do that if there's some way to duck out halfway and get back to the car. That won't be possible, because the river Ouse is in the way, and there's no suitable bridge where I'd need it to be. So I'll set off fully loaded with batteries and other supplies.