I'm thinking of changing my username (because I sort of feel limited to cats with my current one and I want something a bit broader), but I don't know if it will cause any problems with my current strain progression that will cause me to have to start over? It probably won't, but I just wanted to be sure.

It really shouldn't. As far as I know, they use user IDs for that sort of thing, since that's the constant unchangeable aspect of a user account.

Alright, I think I'll change it on 1st March in case I get any other name ideas before then. You can lock this now, thanks.