Just wanna say thanks for sharing this STL. And all the pics and tips.
I bought a couple of Indy props off Aliexpress (for a bit of a laugh, they were pretty cheap and my expectations were pretty low) The Raiders Fertility Idol was terrifyingly bad - they'd actually painted the eyes on with what looked like acrylic craft paint!!
The Grail isn't completely terrible, all things considered. The gold is kind dull and paint-like rather than that nice shiny gold leaf, and the whole thing is way too smooth and regular but the basic skeleton is there and seems solid.
I'll try sanding it to get some pottery turning marks and then redo the finish, but if I can't modify it to work, I'll be using your model and relying on layer lines from the printer to help with the effect. Need to pick up some gold leaf as well.
I have no idea what to expect from the Grail Diary I ordered at the same time. Could be woefully bad, could be halfway decent. Have to wait and see...the Idol is going to give me nightmares though!