Quoted from Goronic:Mine does it from time to time and I haven't adjusted it at all. I am thinking about getting clear tubing - the right size - and carefully slicing a small quarter inch piece to wrap the bottom rail to see if that will deaden the spin. I will post the results (if and when I do this)
If the bottom end loops of the wireforms are at a 30 degree angle up from the playfield, the ball spin will end up being lateral and the ball will rattle in the lane instead of spinning out and up.
So, the bend has to be substantial enough to do this.
The upper loop doesn't have to be bent at all unless you just want to match them up.
It's easy to jam a 1/2" nutdriver in it and force it up as necessary from the top.