Since nobody has weighted in here is my 2 cents. We have 2 F3's, last fall I ripped the auger swing elbow all to h*ll by backing it into the wagon while turning around. I searching the salvage yard for a replacement I discovered that I had to find parts off a later F2 or F3. The M's have a wider tank therefore a totally different mount for the elbow. I believe that the F's have a 8" auger and the M's are a 10", L's are larger yet 12" I think. Not to say that you couldn't retrofit it to work. There is a N7 with a turret unloader out there. Hope this helps!