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Brommers
Tijmen
Seems to be pretty much bang on 68mm, but maybe a road crankset in a mountainbike bottom bracket causes the need for spacers. With a 2mm spacer at the NDS there's maybe 1mm of crank overhanging from the axle (does that make sense?) and everything seems to be working fine.
My thinking with stuff like this is that everything is hugely over-engineered for my 61kg anyway.