I could see from the push rods bending when I turn the engine over, that there was a lot of lateral force from the curved edge of cam. I believe this was causing the pistons to rub too hard against the sealing bags. After cutting the guides to center of where the rods travel, I discover that one of the case pieces has its push rod shaft slight off center. So now I have to make a new one. I may just drill the guide pin hole in push rod to compensate instead.
I also realize now that the the direction of wrist pin should be parallel to the shaft rather then perpendicular like it is in a crank based engine. With the cam driving the piston, the lateral forces from the curve of the cam will translate to pressure against the wall of cylinder. The push rod of this design can slide along the wrist pins, if the pistons are rotated 90 degrees. This along with the guides should reduce wear of the piston seals.
I just got found another older digital camera, so I can keep it handy and try to take more pictures. I apologize that I haven't taken too many.