Hi Jay, there are a few inconsistencies with the curve setup, like one area goes to the bottom of the plate and the others at the top of the plate:


It would be good if those all were ending at the same level. I've attached a result here where I moved one curve's end control point up to that same level as the others and also cut the pieces in half and moved them so they intersected at the top. I also added in an ellipse and then this curve setup can be built with one network:





then I joined it to the bottom plate, 3DM file is attached, is that close to what you need?

- Michael