Suggestion: after "a longer ID with a lower chance of visual ambiguity" show how many characters that will be needed to have the same number of IDs as 53^8 using the 22 encoding.

I.e. for a given number of IDs, how many characters are needed in the 53 versus 22 encoding (people who are not good at math might assume it is more than twice as many).

Actually, 53^8 = 62,259,690,411,361 (not ..360)