Wharry's Enigma Mk II

60g, and if you've chased the weight out of everything else then finding 60g to get rid of is quite handy.

You can always superglue a small rare earth magnet to the crank.

21g per pedal* (claimed weight)

I agree that on a no holes barred weenie project that 42g is obscene but this is a Ti framed bike that, judging by the spec, is built to be ridden rather than mollycoddled.

*I was wrong, I remembered it as total weight difference.