I’m constantly puzzled about these remarks about flexy. I’m pretty sure the stock Stronglight cranks are as flexy as heel, and I’m going to swap them for some old HT 105s soon, but the rest of the frame seems pretty beefy to me. Where are the flexy people seeing the flex, may I ask?
On the Alfine conversion: I’ve got a Nexus 8 hub on my Specialized Tricross at the moment that is cut down to 120mm OLD. I’m quite tempted to build it up for the Brompton at some point – although it seems overkill for my 6.5 miles each way commute. That might resolve the Alfine oil problem – although it’d be no help on the disc side of things.