It might be good user experience to either make variable names case-insensitive (could be done any time before R), or default a1/A1 as the same pointer. You'll

It might be good user experience to either make variable names case-insensitive (could be done any time before R), or default a1/A1 as the same pointer. You'll really want to appeal to less technical folk, and they have trouble with case-sensitive things.