First thing I removed the plastic pilot. Not only does he look like a retard he weighs too much. (No offense to the mentally handicapped or the over-weight intended. I probably qualify for both.
Pretty funny Sturtz.

My pilot looks like he's got a big tape worm under the skin around his neck. Maybe I'll feed him to the neighbor's dog because he needs to be a few inches under too!
By the way, I'm the Vice President of our local Fat & Stupid club so can relate....... LOL
I tried to compare lengths of the engines between the GMS .47 and the .46AX, but Tower's measurements aren't too consistent between the two engines. I'm guessing your distance is right on because your engine is a little longer than mine.
I forgot to mention that the solid rods will work fine but had the same issues with multiple holes in the rod ends. The same guy/gal must have done both of ours. I just epoxied the heck out of the ends after applying thread.
Nice write up Sturtz. Looks like you're building a tank. Keep up the good work.