I have however come up with a very simple design:
(horribly created in Paint.NET)
I’m posting this now so I can see how it compares with whatever is chosen when the competition closes at the middle of next month.
This design is easily written by hand, cannot have some mistaken extra meaning when viewed upside-down, and is narrow enough that it could fit in the space for a zero.
It is also obviously inspired by the letter R.
I’d also be happy to hear your opinions, positive or otherwise.
Does it remind you of anything else, does it have meaning in some Arabic script?