How far should a stove pipe extend out above the top of a tipi? I have an 84" pipe and want to put it in a DIY Tut and with the top measuring at 78", leaves me with 6" of pipe sticking out not counting the height of stove body where the bottom of the pipe sits. is this doable with a spark arrestor or dampener on the stove? I'm worried about melting my tent. What say you?