I think you meant to say " so the ball does NOT bump into the flipper on the way down." You are taking about flipper hop.
I had a bad case of flipper hop on one of my pins. It had to be fixed.
you can see the problem.
I drilled a hole in a piece of plastic to use as a guide hole for the ball guide. This allowed me to move my ball guide in the proper position. Once I had the plastic properly located I taped it down and removed the ball guide and drilled a new hole.
plactic template (resized).JPG
Here are 3 pics of both holes. I filled the old hole and job was done.
wire guide plugged (resized).png
All you need to do is remove the upper metal ball guide. Then get a piece of plastic, or something and drill a hole the size of the hold down screw. Then get a something heavy (a 2 by 4) to rest on your flipper and slide every thing into position and drill a new hole. If you are not moving very far you amy have to fill your old hole with some dowel rod before you can drill a new hole.