I haven't looked at RCA #42 in a long time. So, I got my copy out to refresh my memory. Eric, I agree with you on the box, but I'm not a fan of metal boxes in the first place. The text says it is a modern restoration.
If I apply what I stated in my previous posting, Ignoring all the decoration, this rifle fits my criteria for workmanship. The rifle is aesthetically balanced and the lines are "fair".
Looking at the inlets, starting with lock, it looks pretty good, specially if you take into account that the rifle is about 260 years old. The tang, the trigger guard and butt plate inlets look pretty good accounting for age. The only pipe shown in the Photos is the rear one. It appears to be in line with the rifle and not crooked. Overall, it fits what I consider to be a well-built rifle.
Of course, I'm only looking at pictures, and since Jim Kibbler has this rifle in his possession, he might be able to shed light on the quality of the inlets.
In my opinion if the inlets had been sloppy 260 years ago, they would look much worse today.