My little tongue is hanging out in envy....Flatiron is a very good make indeed. And it is no big deal to fix your problem, get a piece of micarta, and make a new nut. You will probably need to redo the bridge as well, equally easy fix. There is a formula for placement of it, which i don't recall...yell real loud, and get'spaw to give the formula. Lucky you, nice mando, just needs to be set up properly. Any luthier could do it in a flash for you, but reallly is not difficult. Have set up all 3 of my mandos myself.