Well trying this for know and dont know if it will harm any thing on the stove.
I am forced to add two 5gal pails of coal at a time to the stove on refill's as its been so cold and i am gone 10 hrs at a time.
I leave the direct draft handle up all the time feels it heats better but the exhast flue pipe gets soo hot when i add that much coal at a time.
the flue ports on the stove sound like the after burners on a jet and that's got to be a lot of heat being wasted.
I turned out the two screws holding the cover plate over them and added some fiberglass insulation to cover the holes and seal them shut. Then added some more for the cover plate to hold it all in place.
I then did a reload and so far this has worked great nice easy temp climb and no over heated flue pipe and
no puffs from the stove.
I now do use the spin draft on the loading door in place of the flue pipe ports to burn off the volitas seamd to work great andy body else try this?