This is one of the first spider tanks I've built.  It uses a different
articulation system based on technic pins and is consequently weaker
and more difficult to pose.  Road Spider was the first attempt to build
more robust joints while Spider Scout and Heavy Spider have joints
based on the pneumatic T-pin piece.

The turret just has a lot of things slapped onto it, and the body was
simply too small at the time to accomodate a minifig driver/pilot.

http://www.cs.ndsu.nodak.edu/~pratt/