Some issues with new MakerFarm Prusa 8 i3v

[printbus]

If the hex hot end build video doesn't appear to apply to the hex hot end you received, it could be you're at the point where you need to contact MakerFarm for help. Colin has been good at responding quickly when people ask questions.

I replayed the hex hot end build video. I don't see any discrete nut being mentioned, but mine did have the described flats on the brass nozzle and on the narrow shaft above the aluminum block. Has the hex hot end been changed? Tightening should have been done when before the hot end was used and would now have to be done with all traces of filament removed from the mating surfaces. Maybe someone has successfully tightened things with the nozzle at temperature so the filament is fluid, but I don't know that.