Thank's! I used to build it in lego when i was younger. But at that time it didnt have to resemble the Falcon, it just was...

I have not yet decided how to go about a final shape of the large disk. So i dare not touch it for now.

So, the tube-cockpit is just positioned into the disk-form, and not connected to it, there is no trim-action there, and I dont think that would be necessary either.