This started with a basic statue of Starscream I built in the HL2DM builders mod known as Phoneburnia (Phoneburnia.com :: Index - Phoneburnia.com). It's similar to Garys Mod, but requires no additional installation (other than downloading the maps when joining one of their two servers). It has no special item selection menu or graphical interface, so you make do with keybinds for moving and rotating objects that you spawn through the chat bar. These are about 15-20 feet tall in-game, and so far, I have done Starscream, Thundercracker, Skywarp, Ramjet, Dirge, Thrust, and Sunstorm. This first batch of screenshots is a little old (I've improved on their models a bit since then), but I'm sure I have more recent pics somewhere. Yes, they are made out of basic props from the game (and a few skinnable blocks and slabs made for Phoneburnia). They don't move, but I can slap thrusters on them and fly them around like the vehicles I build. Also, because of they're made from so many parts (about 120 spawns per seeker), rigging them to be poseable is pretty unrealistic.