There are several categories of letters:
These letters use only the middle of their respective hexagon:
These letters use the middle and right portions of their hexagon only:
These use the middle and left only:
These use all the hexagon:
Now an example of them together in print:
For spacing between letters:
The rule is there is a third of a small hexagon worth of space between each pair of letter's furthest extents except no extra space is required between two letters furthest extents that would directly touch. Like for instance between the e and r in "Over" the e takes up the whole hexagon and the r only uses from the middle rightward. So the left portion of r's hexagon makes up the spacing between the two. But between the D and o in Dog, the D uses the right portion of its hexagon and the o the left part of its but no extra space is needed.
For spacing between words:
There is either a whole small hexagon between the last letter of a word that uses the right side of its hexagon and a letter that uses the left side of its hexagon, as in between the e and Q. Or 1/2 of a small hexagon and a third of a big hexagon, as in between n and F, x and J, etc..