I remembered a mapping trick Andy used sometimes which would allow me to do minimal changes to the fuselage mapping and keep three sides (instead of four) but would fix the rivet stretching problem on the bottom. So I worked on that today and it looks pretty good. What Andy did was manipulate the segments of a part by hand to tune the mapping.
The problem was since I only had three sides the bottom of the fuselage was mapped in a very narrow area at the bottom of the left and right sides so there's very little distance between the segments going across the bottom of the fuselage, which caused anything but a solid color to stretch. So what I did was use vertex mode and select all the vertex down each segment of the bottom then I moved that segment down which makes each side of the fuselage taller at the bottom where I manipulated the segments. But the change is minimal so I still have plenty of room between each of the sides in the map. The bottom of the left and right side of the fuselage is extended about one half inch on each side but there's still plenty of room. It's a trick I never wanted to use so I've never done it but it does work and keeps me from completely remapping the fuselage, with four sides, which would change the map a lot because I'd have to move quite a few parts to get the extra space.
I still have to rework the color scheme and check it out but it seems to work okay so I'll probably use it. So PilotAt6 unfortunately there's going to be a change to the mapping but you'll only have to extend your fuselage color about one half inch down on each side, so minimal changes. Sorry about that.