Unexpected mass distribution

I've taken the Experiment entirely apart, in the expectation of sending the frame off to be painted and the fork  to be updated to cope properly with a newer dyno-hub.  (Repainting being about the only way to deal with the car scuff.)

Having got it apart, picking up the frame gave me a "is this real?" moment; 150 grams difference between the whole frame and the fork.  Not something I'd ever noticed before, since the combination is under 3kg and the total assembled weight—fenders and racks and gps, but no bags—is just about spot on 17kg.

It's going to be interesting getting it all back together.