Cambox Caps
To make the cambox cap, start by imitating the shape of the top of the gear tower.
There is a radius on the front and back of the caps, but they are different. The rear of the cap mounts flush with the cambox cover.
The front however, has a raised lip and the edge has a larger radius.
There is a flange at the base of the cap and the stud mounting features that align with the holes in the gear tower. bolts mount through these holes securing the caps into place.
I worked on finishing up the gear tower sub assembly with the bearings, shafts and gears in place.
Above are a couple of images of the engine in its current state.