I have 2 TZs. One of them has an issue with the rocket launcher shooting air balls that sometime hit the crossover trough. When it does not clip that, it is a bit random as to where it will land. I checked the coil, plunger, and mechanism... and nothing appears bent or out of place. I compared each part to the "working" TZ that I have, and I don't see much difference. At the end of the "throw", the plastic cup on the end of the arm almost touches the playfield on the bad one, but is back a 1/4 inch or so on the good one. There is no adjustment slop in the brackets, and the parts are mounted in the original holes.
I'm was wondering if the lane switch might be closing too soon due to the wire adjustment and causing the launcher to fire too soon, but I adjusted that and it does not change anything.
The side steering adjustment also does not change the air ball launching.
Has anyone else seen this issue? How are you supposed to adjust this turkey?