it's impossible to get the float in upside down. theres the little cutaway for the needle it can only go in one way
I'll look into the metal ones. Anyway I dunno how I posted about it in this honda rebel thread without considering it's basically the same as the rebel carb, those floats are no problem to come by. Only difference in the carb is the nighthawk's a bolt on vs the clamp flange for the reb. so that's nice.