So a few days ago, I learned that Gimp 2.10 can correctly save layer groups in PSD files, unlike previous versions of Gimp where any exported PSD files would merge the layer groups into a single layer (2.8) or layer groups just weren't supported at all (2.6).
So, I have updated this base (along with all of my other bases) to have the base contained within a layer group for easier transition from it to your template! I also have made sure to standardize how I'm wording the watermark layer so that it's consistent across all of my bases as well.