Nice mask setup. Personally, I would avoid separate bsdf’s for easier baking and just have the basecolor, rough, etc come out of the material groups. This makes baking a snap at the end since you can just bake them all with emission.
Another side effect worth noting: generated texture coordinates tends to warp a little in some cases so I generally end up using object coordinates in my workflow because I always retopo and bake out textures in my workflow.
Standard box projection creates obvious tiling effect. Here’s the textures done so they don’t tile with a node group I derived from a great post by CarlG in case you’re interested: nodes.blend (470.7 KB)