Years ago i welded an electrician's bit on to a 6 or 7 ft piece of steel rod and also welded a small ''T" on that shaft. It fits right down the center of the tube and you can auger 'at will'. It saves the trip into the bin, can be done at any time, and hangs on the wall nicely when not in use. The fines issue will be solved later, but it is nice to not crawl into the bin in the middle of the night. Necessity is the mother of invention..........
Don't damage that knee, recovery will be long enough as it is.
Mine isn't an arthroscopic solution, but as good as us old timers can do. It seemed that I did slide a piece of conduit over the shaft also to account for the size difference of the 1/2" shaft and the hole in the anthratube.
Yes, I'm one of the guys that put a return heat live under the bin to keep it thawed and dryer.
I have done the same technique on the 9 ton bin for my EFM 900.
'Fines, wet or frozen' are not good words in the coal burning business.
No problem when the degree days number gets much lower, but we had 5 feet of frost yesterday on a ruptured water line repair, and that wasn't in the street, but in a driveway. Thank God for excavators with pneumatic hammers! Beats hanging onto a 100 lb hammer when it 6 degrees out!