I had not either John, I was shocked it would barely turn and had not twisted the shaft yet.
It had galled the shaft and the stuff left in the bottom of the distro was definitely clay dust from that dirt track. There are 4 venting holes in the bottom and a big vent in the Cap to let out the charged ions, but it also lets in dust and dirt.
My guess as bad as it was bound up will likely be a tenth too (in the first 60 feet maybe)...we shall see again in just 5 days. You can see where the 2" bushing sleeve wear was in the pic above. The first shaft I have seen though w/ that spiral oil groove and that drives oil downward, but also dust and dirt too that finds its way in, packed it all tight into that machined grease groove. The stuff in that groove was like concrete until I put it in Berryman's Carb Dip. Then I could scrape it out easily w/ a pick.