Comouflage painting of all textures of the T-33

After I put a lot of effort and effort into creating a livery for the German Air Force T-33 in blank metal, I have to say that the T-33 is simply a disaster when it comes to repainting. I absolutely cannot understand how someone could do something like that with iniBuilds. Working with the textures: "EXT-DECALS" alone is almost impossible. Why can't you work with these textures in "Blender". Why weren't the textures of the wings and stabilizers designed so that they can be painted/labeled on both sides? For example, I would like to do a camouflage paint job; for example, the stabilizer is different on both sides and cannot be created differently in the repaint due to the mirroring. I have already created a lot of repaints; but the T-33 is an impossible challenge. I hope that iniBuilds will remedy this as soon as possible. I have the feeling that beginners were at work here.