It sounds like you have everything you need to start building. What are you waiting for?
I have a thread here on RCU in the kit building forum. I started a couple of weeks ago on my SSE and it is my first kit. I was reading through your thread and I was thinking about my building table. I am using a ceiling tile also, but it is over a cardboard table. I am hoping that it is leveled. I have a level in the room and I never thought about checking it to seeing if it was leveled or not. I am going to call my wife. Well, she said it looked pretty level with the tool.
Does anyone know how to check the wings?
Good Luck!!! It is a great kit for beginners. You have to love the detail instructions.