Hello.
Standard disclaimer, I'm very new, bound to make mistakes, etc.
My hive is currently four Warre boxes high and the space left might be gone in 2-3 weeks (put a new box on Sunday, all three boxes were full of bees, bees were bearding off the entrance, bees, bees, BEES everywhere). I'm happy to go to five, but I'm only a bit over 5' tall myself, so physics is against me for management.
Is it worth attempting a split in autumn in my area, or is that likely to be pointless? I don't mind failing to gain the experience, but I'd be really upset if I killed off my main one from stupidity, and if there's no point at all due to it being just way too late, then I'll try in Spring instead.