WOW Rocky !
After your prompt on the cross member, its taken me most of the afternoon to read though 5357s continuous thread - some of which I had seen, most of which I had missed.
I think I am only 65% of the way on 6997 on the various improvement as compared to where you have got to. Well done on documenting on what are some monumental tasks. The good news 6997 is in one piece at the moment running load and strong and straight as a benchrest rifle ! First time in a few months as I have been rebuilding the cooling system, another part of your posts that were very interesting to me.
All I can say is I still have a bit of a way to go but am going to finish this beast!