I rebuilt my alt last year and installed Mikes 200a upgrade. about 120 miles later now the volts light flickers when started. The scanmaster reads 11 then 13 v up and down in conjunction with the volts light. Also the interior light flickers with it too. I pulled the alt and had an alternator shop look at it and they could find nothing. Said the positive stud was a lil loose.. I put it back on and its still same. Does anything think the new regulator inside could have gone bad??? Can I replace the one in Mikes kit with my old one from my old working alt that I pulled parts from to build the 200a one?? What else can it be?? any ideas?