Hey @voxel_pirate
Thanks so much for checking this out, to confirm this is a stand alone mod, it should be the bare bones of @chabonit 's whole thing for testing out if the mason builds the fine bird bath (or not). Essentially a fine item crafting test for the mason 
I’ve had another go using your suggestions and if I alias the bath in that way the game does not load past the black screen (which usually means that something is wrong and should be in the log, but there is no help in there)…
I haven’t seen any posts with a fine version other than @Chabonit 's one so far, so I’ll have a go with the search function here to see what I can find as it may have been buried.
Thanks again
(edit) Turns out that @Chabonit already posted about the same thing about two weeks ago Post here, I agree that there is a bug here, so I’ll wait for it to be fixed up