after cutting the pieces i sanded the edges and glued everything together.
the front curved part is a lamination of 19 identical pieces.
i inserted machine screw insulators in the holes that will accept the shafts, these are in nylon and will act as bearings.
the slots in the back of the frame are for the adjustment of the track tension and are long enough so i can choose between A and C gearing.
the triangular part is a small turret to mount the GP2D12 on the servo.
next step, the electronics...