I downloaded it from here, the V29D.stl, and just opened it up in Cura 15.04.5
I couldnt print out a scaled down version as my Z axis threaded rod somehow has detached from the coupler on my prusa i3. Couldnt be bothered fixing it today.
But yeah, I too am confused why it would come up at 90cm if it really is a matter of inches and mm.
Well I downloaded and opened the V29.2 stl, and this one opens with the correct measurements, 63.881mm
I guess the scaling for the V29D stl that you have uploaded here is wrong.
So could it be those with prints that do not work are printing the V29D stl one, not the V29.2 stl?