OK, I'm tracking now.
The more I play with this the better I understand the construction of things and how the nodes connect or don't connect to each other. It's coming together much quicker for me now. I was able to put together the underneath…
There's about 5 ways to model that cap. What I tried was to create a round plate mesh and extrude it. It looks like you revolved a rectangle, is that correct?
What I tried failed when trying to do the bonded contact and also gave material assig…