I would just let go of your desire to have it switch across bikes. Put a dynamo on the commuter and use regular rechargeables on other bikes
I’m also loathe to build a new front wheel.
Buy one, simples... ;)
@Nef started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I would just let go of your desire to have it switch across bikes.
Put a dynamo on the commuter and use regular rechargeables on other bikes