Well, tearing apart the Keystoker for it's spring cleaning...
After a good vacuum of the whole inside,
Removed the burn plates, WOW, a lot of fine build up under the burn plate, I know it was burning kinda funny V-Shape instead of straight across, now I know why.
Removed the Grates, vacuumed under the grates, wire brushed them good, made sure all the burn holes were clean, put back in, re-sealed the back and all the joints with hi-temp funance cement (Rutland stuff).
Removed the hopper, Removed the Stoker block, stoker motor, did a thorough cleaning, lube, cleaned the slider sections, etc...greased everything up, carefully put it all back together, plugged it in, and made sure nothing was bound up, works smooth. The nylon cam bearing and nylon screws were all in good shape. So, no burn back towards the hopper.
Just have to remove the power vent and clean it the best of i can and the disconnect the pipe and clean it.
Scraped/wire brushed the inside, need to hose it down with LPS stuff.
Almost done and ready for next year (4th year)!!
Next will be the LL, still burning (about 6 bags left) on idle keeping the late night chill off the house.