@russell.neilsen thanks for sharing your model I think it’s a good way others like me can learn.
I see you make almost everything as a component, that’s good (better than I do).
I’m nobody to talk about what is right and what is wrong, I tell what I’d like people to tell me.
If you change the color for back faces in Styles > Edit > Face settings you will notice some of them are reverse. You can all of them and then right clic reverse face, I think you can also automaticaly fix it with the extension Solid Inspector²
Once it’s finished you can place it at the origin, you can cut the whole model and paste it like this.
Thank you again 