Thanks - that sounds even better. I'd heard rather conflicting prognoses from people regarding that scenario and the likelihood that it would lead to my early demise. A guy in a bike shop a couple days ago said that there wouldn't be enough protruding axle at all, and someone on the Rivendell Bleriot list said that Peter White had built him a wheel with a 130mm hub, but had only added 2.5mm of spacers because he was also concerned about the lack of protruding axle.
Your suggestion does make sense to me though, since it's not the protruding axle ends that the bike rests on (but rather all the stuff clamped by the QR).
It's also the most economical in terms of money and parts, so i'll go with it
