A restoration is unpredictable. It's like 50/50 at best and very difficult even with an in hand inspection to anticipate certain difficulties. It seems that I always have at least one unanticipated snag in most of my restorations. The average could be worse, I'm not keeping score. It could be one stuck screw or rod, one key or tonehole that is poorly aligned, a ghost leak somewhere. That is when I learn the most about solving problems or when to give up.
The Selmer looks fantastic. I should adopt your policy of sticking with one best player and perhaps one spare. There's a nice Marbeau listed now for a more reasonable price. I didn't look into it in detail.