OK, so I’m bringing you good news and bad news.
Good news is I’ll have some time to investigate the Bugged Lattice of Death (BLoD) issue tomorrow.
Bad news is I’ve watched the Malley’s devstream about new asset ideas again and my conclusion is it pretty much kills the idea of Finetems mod. In future releases Finetems will be shrunk significantly, adding only these assets which should appear in vanilla but they somehow don’t, like tall clay windows in all colours and tall diamond wooden windows, which will hopefully appear in vanilla at some point. Instead of expanding vanilla item sets I decided to create new ones from scratch to keep the whole set internally consistent despite upcoming changes to the sets made by the devs. The new sets would be released as separate mods.