I'm fairly certain that the 610 pin is adjustable, so you should be able to just unscrew the 510 pin to make up for the lack of connection. Hope that helps = ]
Edit: whoops, I was confusing it with another atty I got at the same time that DOES have an adjustable 510 pin, nvmd. Sounds like you may have received a defective product with a QC issue. Maybe try getting the distributor you purchased it from to swap it out for a new one.mworth a try at least...good luck = ]
Yeah, it works great on my regulated devices (SX Mini and a Sig 150) so I just decided to roll with it. For the price, I wasn't expecting much to begin with, and I knew that there would be some new hawtness coming down the road soon enough that I would begin to covet. Wasn't worth any time of effort beyond messing about in my living room with the atty's on a Wednesday night or what ever. Do like the stainless steel on my SXM though, makes it look like it's wearing a hat