I have inspected each connection point along the wire harness and found no issues, from my 2006 Vinson I have swapped over starter relay, complete fuse block assembly problem did not follow to my 06 nor did the problem go away. I have not change out the regulator because all tests show it to be working fine. An additional piece of information that makes me think maybe a diode is bad is I am getting power feedback when I should not. I am going out on a limb saying maybe if the starter at times draws more amps than it should the neutral switch diode could cause the problem I'm not sure. The big thing I want to avoid is purchasing non returnable electronic parts and also don't want to go real deep into swapping parts over from my 06 since when the issue goes away the starting issue may go away for extended periods of time making it hard to determine if I found and corrected the problem or not. This is a true electrical gremlin.