Dual material boot and glove pieces for Tinkerplay

The Tinkerplay (now Thingmaker Designer) parts include leg and arm pieces that simulate a boot and glove. This thing separates the boot part from the leg part, and the glove part from the arm part, so they can be printed using dual extruders, and be more "realistic".

The parts are modeled with an extended peg to make them stronger.

In the example shown, print the thigh in orange, the boot part in orange and black, and the foot in black to get the results shown.