Thanks. I'll try and get a few pics of the pellet feed up for you. It's actually really simple. Gravity is your friend.
It works really well and is probably the best engineered piece on the entire stove.
The burn tunnel is 3.5" square tubing. I welded a 3" piece of 3" round pipe, with corresponding hole, onto the top for the the pellet feed. Inside the 3.5" tube there is some flat stock that extends about 2/3 the way down at a 45 degree angle. That piece becomes the ramp that the pellets slide down to hit the burn platform. The burn platform is expanded steel and has a corresponding 45 degree slope that mates to the ramp.
On the forward side of the pellet feeder hole there is another piece of flat steel welded inside the 3.5" square. It extends 1/3 into the square tubing at a 45 degree angle. On top of the burn tunnel, just forward of this piece, are a couple of 1/2" holes for secondary air. This piece of flat steel doesn't really do much for the pellet feeding, but it does direct the secondary air across the top of the pellets.
Hard to describe in words so I'll try a little video or pictures later. I guess there's a reason for the saying "A picture is worth a thousand words."
Yesterday I ran it full-on for about an hour and then backed it off to about 75% by cutting down on the intake air. Two hours in it was 64 degrees about ten feet from the stove in my main work area. Outside it was 27 degrees.