Quoted from MK6PIN:
Would be a bit of extra work, but I would think taking the bracket off, widening the outer hole, and using countersink screws would be a nice, clean fix....good get!!!.....I'll have to look at mine when I'm back in town Monday.......
Did a bit more work on it today, and there is no doubt it helps the left loop. Absolutely no rejects, and only the odd rattle. Having the bracket on either side of the ramp entrance makes no difference to ball "damage" IMO. If the nibs are in the original position, the ball can just as easily hit the metal ramp itself. In any case, in this circumstance the ball was hitting the nib bracket when it was outside the ramp (when it was bouncing around the left orbit).
As I said My only concern are the threaded screw holes left on the outside. I've covered them in a small amount of tape just to test it out - made dozens of left loop shots, and no damage to the tape. So the ball is either not hitting them, or not hitting them enough to damage the tape.
I'll take the risk. There are plenty of other edges on this game that will do more damage to the ball. And it is a big improvement.
The main issue is the geometry of the entrance to the left loop. To make way for the extra left ramp (as opposed to BDK) the loop had to be narrowed, and the angle had to be changed (flattened). As a result the ball is hitting the left loop guide at an angle that makes it bounce a bit instead of following the guide around. I also did some slight bending of this part of the ball guide and it has helped also.