Wear

Just shy of 570 km and the molding bead down the centre has worn flush with the tyre surface.  It wasn't quite flush—is still not everywhere flush—with that surface at 500km.

I hope this may bode well for the expected lifetime of the tyre.  (Schwalbe Marathon Plus; they have a remarkable reputation, but Toronto has some rather nasty streets.  So I've been finding the reputation cheering.)

The angle, well, with the Experiment in the stand, the front wheel never hangs quite straight.  I could presumably haul out a plumb bob and alight everything so it did, but that would inevitably move the clamp away from its present pleasant "matches the seat post for hoisting purposes" position, and it doesn't seem worth it.