Quoted from Tranquilize:Mines at 95%. I just adjusted with the screw. I don't see the screw holding forever though. Wedge would help with that.
I still don't fully understand the problem, so I decided to take a slow-mo video just focusing on manual launch. Until manual launch is 100%, it's unreasonable to expect auto-launch to be 100%. I'm able to get manual launch to fail ~20% of the time. The slow-mo video suggests the ball is grazing the left wire form in the shooter which sets it off slightly from that point on. When it succeeds, it never touches the wireform.
What causes it to drift slightly left? I would imagine it's related to the shooter being off ever so slightly. Considering the horizontal "play" in the PF resting position, it's not too surprising if the shooter isn't "spot on" (especially since there is 0 vertical adjustment). If the PF vertical isn't absolutely "spot on", you could imagine the shooter rod hitting the ball ever-so-slightly low and causing it to go slightly airborne, causing it to bump into the left wireform.
Just to be clear...this is what *my* machine is doing. I'm not suggesting this is what other folks are experiencing.