I swear the gunmetal units are all being made on Fridays or something. Mine had basically identical cosmetic flaws that I documented here, and I'm preparing to contact Preston about the 510/instant low battery warning issue.
That issue in particular irks the hell out of me. They made a big deal about using Fat Daddy 510s in the early versions, and then it seems quietly switched to a cheaper supplier for the dna 40 editions. Now dozens (Hundreds?) of these units are having problems apparently related to that connector.
I'm to the point that I don't even want to look at mine so my blood pressure will stay in check. All I can say is I hope my next post here is another talking about how wonderful their customer support is. I'm over the machining and other cosmetic flaws in it, I loved it early on for its ergonomics and performance and just want it to work properly again.
I was under the impression that the newer proprietary 510 was actually better than the Fat-Daddy, I know mine is.
Sorry about all of your issues, glad I didn't get one like that.