Thanks everybody.
I havent thought what time or universe yet...if one of you has a good story line for this, then we will use it!
The reason I put foam inside the plastic blister was to stiffen it up from the inside while keeping it light. Also, I want to add lighting, so the foam will hold the wiring in place, too.
Here's the latest...working on the 3 warp-drive? engines and shroud...used egg containers for the exhaust nozzles: