Ejust E- wow- no idea that such an adapter was out there-not cheap is it.
Strop- hmmm, the cheapest double pivots are about $30 delivered(nashbar) - not a bad idea, and not too expensive.
wrk101 - if those rims are steel, they will be the first to go.Nice shiny chrome plated steel isn't a great friction surface.I have some 700c I'm going to fit to it.
Thanks
Charlie