I'd finished the reeeeeeeeeeeeeeeeeeeeeeeeeeetopo by the end of the last progblog and was working on transferring the texture maps.
Only something went kind of horribly wrong and things were getting transferred oddly (I could see the shapes but they weren't where they were meant to be). I eventually decided to just redo the sculpt and after a moment of confused panic as it's backwards to how I was starting to normally do things (sculpt, retopo, bake) and I was trying to be careful of the shape of the original mesh, when it entered my thick skull that I can just shrinkwrap the base mesh, and nuts I went.