Uppercase letter o and zero look quite alike

[uzluisf]

I don't know if slashing the zero would go against the spirit of the original font but right now uppercase letter o and zero look quite alike which might cause some confusion.

[abrudz]

To keep 0 consistent with ⍬, I've added a middle dot instead of a slash, so it can be reasoned that the dot is behind the tilde in ⍬: I hope this helps.