Finding different numerals to use

While learning multiplication in dozenal, I quickly ran into the issue of answers getting mixed with my already memorized decimal multiplication tables. So, to remedy this issue (and to prevent dozenal from corrupting the decimal multiplication), I began a search for an alternative set of glyphs for numbers! And after several uninteresting numerals, I came across these Kaktovik numerals!

They're wonderfully simple, can be drawn without lifting the pen and clearly tell which number is portrayed, which also makes them easy to learn. And yes, it's for base-20, but it can be easily adapted for base-12 by cutting off the right column and bottom row. So each upper/horizontal line represents 4 and every vertical line represents 1.

Now I can properly start getting into learning multiplication and other basics (reminds me of elementary school and I feel like a child again!). If anyone has any other interesting numerals to use for dozenal, I'd be interested to find out what. I don't particularly like using 1-9+A,B, or X and E, or such and I'd be happy to find more interesting alternatives!