For most friendly games I think people tend to skip this rule, or incorporate it in houserules.
e. crossing a bridge or other obstacle forcing a unit to narrow and then widen its frontage cost the halve of their move.....
Also, doing an about face, usually means units stay in place, so the actualy distance moved is considered zero (just the minis on the stand moving, instead of the stand
)
Doing some of the Math, I think in the forum there is already some diagrams
wheeling on a point.
The radius to the furthest point of the stand = 4 cm.
A full circle would be 2piR = 2x3,14x4 or 8x 3,14.
We usually "measure" the number of "quarts", so a rotation of 90
o or less, but > 45
0 would be 6,28 rounded to 6 cm of movement.
Wheeling on the center, your radius goes to 2 cm, so the full circle would be = 2x2x3,14 = 4x 3,14, so a 90
o rotation would be a 3,14 rounded to 3 cm move, and an about face would be 6 cm move.