Yeah, that was a good idea.
Alas it hasn't helped. Here's my results.
Max set to Meters Export as DAE(Meters) = Success
Unfortunately I'm want to print in Colour Sandstone.
Max set to Meters Export as WRL – Shapeways set to M = Fail (too big)
Max set to Meters Export as WRL – Shapeways set to MM = Fail (too small)
Max set to MM Export as WRL – Shapeways set to MM = Fail (too small)
Max set to MM Export as WRL – Shapeways set to M = Fail (too big)
Max set to CM Export as WRL – Shapeways set to MM = Fail (too small)
Max set to CM Export as WRL – Shapeways set to M = Fail (too big)
The error message from Shapeways doesn't tell me how big or small the it thinks the rejected file is, so I'd have to just guess different sizes until I found something that worked.