It’s a water neck for an automotive intake manifold, 1 1/2" OD, 1/4" wall. Before I made a pattern and core box, I thought I’d have a go at lost foam because I have some other similar one-off parts I’d like to make. I made a few fixtures for my overarm router so I can pop out copies pretty easily now. The question is how to gate it? It’s going to be a challenge. All suggestions welcome.