Any idea when the customiser will be available to use?
I got good news and bad news. Good news: I had reason to fix the bug that was keeping it from working. It's working again! Bad news: it's still on 1.12.
I'll update it to 1.13 when I get all the unique textures I want for 1.13 done. It's quite a bit of work to get the textures setup for the customizer and since they renamed so many textures I kind of have to start from scratch and I only want to do this once.