I am using the Dominic System for 0 - 99, and am now thinking about adding extra characters / props for the months of the year (Jan- Dez) as well as centuries (19century, 18century etc.). I was also thinking of having an extra prop for times of the day. So for example, I might remember the codes for 12 + 18 and then add Stephen Hawking, indicating that I should read the two numbers as time, e.g. 12.18 pm.
Another user on here suggested using a rope to connect two dates, e.g. the 2nd World War was from 39 - 45, that would be : code for 39 + 45, connecting the two with a rope somehow, indicating that this is a
from - to relation.
Do you think this is a valid approach? Or do you think this is going to clutter my mental space / images in the long run? (Might need to open up a separate topic for this.)
In any case, what other additional props / symbols have you found useful to introduce?