There was a small nick out of mine and the missing piece of red insulation was still on the regulator. I don't think the problem is as much the edge of the regulator, but the top right corner of the regulator (with leads exiting bottom of regulator). I beveled mine and rounded that top corner.
I think the best fix would be to get a new regulator, leave the leads long and relocate the regulator to the left. In my rx, there's almost a 1/2" gap between the regulator and rf pack. Fireup's pics have the rf pack closer to the regulator than mine.
__________________
|