After making the Glowstrand, I decided that I wanted to design something that was all mine... and with a big change, Mid Outboard Motors, using some cheaper more available motors. I got the motors from IC Station, but they are available in many stores. They must have the dual output shafts for this design. Deca is very fast, its going to need some excellent sensors and processing, I'm using a Parallax Propeller Quickstart board and a L9110S DC/Stepper Motor Driver Board TBD for motor control. It also has eight 4 x 10 x 4mm ball bearings for the big gears. I used short pieces of filament for pins on all the leg joints, carefully melted over the ends to make them stay put. The frames are held together with four 125mm long pieces of m4 threaded rod, and a bunch of nuts and the 8mm and 11mm spacers. I used nylon nuts mostly. For the big gears, I used two 53mm long pieces of m4 threaded rod as axles, with m4 locking nuts. For the crank pins I used m4 nylon screws. You will need to drill and tap the holes in the gears. You will also need to clean up all the 4mm and 1.8mm holes in each part.
12/11/2015 Added updated Servo Head. Also added an extra battery tray for 1700 2s LiPo to attach to the bottom, so there is more room for components in upper section.
12/20/2015 Added upper tray for processora lower front IR Sensor mount and I made a new servo head for a RadioShack Ultrasonic Range Sensor and a Sharp IR GP2Y0A21YK0F Analog Distance Sensor. Recessed mounting holes for 9g servo horn, also has nice wire path. Also posted here:http://www.thingiverse.com/thing:1213658
12/29/2015 Added Nikia 5110 LCD
Here are some detail shots of the drive system