Mako Engine Door

Reworked this old model to make the rear lighter by hollowing it out. Ended up a crawlspace about 6 studs deep, 2 bricks high and 2 studs wide. There's enough room in there to build some kind of power plant. Also, the Technic parts that connect to the wheels are exposed in there, so a minifig can wrench on them lol

 

I added this door to access the crawlspace.

Done