I really like this for for the vast amount of info. But in this case I'm getting an overload. I've been reading up on all the glow plug posts and it seems like there's two different camps on this issue. One side has the Wellmans as the best because their original issue and if 1 or 3 go back the others continue to work on the assigned voltage. Then you have the AC60's which won't are better but when you lose a few the remaining ones tend to swell from the excess voltage. And of course there's a bunch of people in both camps that swear by their choices. I probably will just leave the ones in my M1009 as it starts fine, but I'm going to have to replace the ones in my pickup soon, just got to figure out which set to get.
Did you read the 10 or so threads that come up with a search for SSDiesel supply?
I think you have mis interpreted 100's of posts.
I only recall one member saying his wellmans worked with only 3.(not normal)
If you understood the GP system , you would realize no brand will last, with a stock system and a bad GP.
Wellman quality in my opinion, is piss poor. (I have plenty of reasons to say that, and probably have in other threads).