I was fooling around with variants earlier by flattening them to strings, editing the bytes, and converting them back, then creating constants from them with scripting. By editing a string variant, I was able to make this: This is a fixed-length string. If I right-click it, it gives me an option called "Set String Length", which isn't there on normal strings. It lets me set fixed, bounded, or variable (which changes it to a regular string and removes the menu option), as well as setti