I am convinced that a need a new R/R on my stock '85, I am only charging at 13V. Two questions: 1) Has anyone tried the Shindengen #SH569A-12 R/R from RegulatorRectifier.com? It is $70.00. I prefer a replacement the doesn't require altering the stock mounting. 2) What is the best way to replace the part? It looks like it would be rather difficult from behind. Is the easiest way to remove the rear footpeg bracket? Am I missing something? Thanks in advance.