I have decided to change my controller again.
The swing mode just didn't feel right with the springs plus the springs were not strong enough to return the handle to neutral. I removed the springs and it feels much better. But....with the pot set up as a reverser it has to be centered exactly to keep power from going to the motor. I put a 1/4" strip of epoxy on the pot to give a bit of center dead band but with the over gearing the stick still has no wiggle room and must be perfectly positioned. So I made this detent assembly that solved the problem-
Here it is assembled-
As you can see it is adjustable so I will have to play with it a little to get the tension correct on the detent.
I think the problem is more with the operator than the controller but my hands and fingers are not as sensitive as they once were so I had to make it comfortable for me to operate. I think this will be the best solution.