Great job.
One thing I'd like to point out about bolts. Typical Stainless bolts are weaker in shear, which is the situation here, than grade 8 so they're not a very good choice of fastener. The only time I'd use stainless here is if they were ARP. But I'm not sure you really need stainless since this assembly is covered and coated with oil.
And one question. Why did you use a ball mill on the backing plate to make the tapper for the bolts instead of a carbide countersink? Tool availablility perhaps?
Don't get me wrong, I'm not trying to dump on your article, I thought it was very informative. I hope I never have to do it, but now that I've seen it done, looks to be not too bad of a job.