Lego Unit: 1 lu = 1.6mm
Diagonal positions are given in Horizontal units (1
stud spacing = 5 lu) versus Vertical units (1 beam height = 6 lu); i.e. 2:3 means 2 stud
spacings vs. 3 beam heights. Diesis signs (#) in horizontal units are half-intervals (2.5 lu),
bars in vertical units are thin plates (2 lu). Half-intervals can be obtained by
using special two-hole 1x2 or single-hole 1x1 beams available in some Technic sets.
Alternative way is to use Technic beams or narrow plates that can be put on top of other
beams with half-hole offset - they will bind with holes in studs.
* Pairs marked this way are closer than ideal by the
distance given in the left column
Example: 4#:1=* means "axles are
separated by 41/2 holes horizontally and 1 brick and two plates vertically; the resulting
distance is smaller than ideal".
Errors more than 0.3 lu may damage your teeth...