[PSUBS-MAILIST] q ball arm

[hank pronk via Personal_Submersibles]

I have made a big discovery. A cue ball arm can be made very easily with a 1 1/4 ss ball valve and a 1 1/8 dia cue ball.  I removed the ss ball from the valve, just to check it out and found the ball is .004 in smaller than the cue ball.  I am going to assemble the valve with the cue ball in it and pressure test it.  If it works, I will machine the valve ends so the cue ball arm has maximum range of motion.  
To build a duplicate cue ball arm like Gamma has requires some extremely technical machining.  When I removed the insert that carries the cue ball, from the hull, I found it was damaged and causes the cue ball to drag causing damage to the ball.  Since I do not have the skills and equipment to machine that part with the radius in it, I will try the valve idea.
Hank