ONE OFF, LLC - AK Zhukov Picatinny Stock Adapter

I bought the Zhukov S for my Pioneers Arms hellpup and the Zhukov didnt actually fit and i bought this adapter which fit perfectly and did the job. My hellpup looks awesome.

I have both this One Off and a Haga Defense Zhukov 1913 adaptor. I decided to try this one since the Haga was out of stock everywhere. The issue with the One Off, as compared to the Haga, is that it uses only one screw (and a smaller clamping area) to secure the adaptor to the 1913 rail. Which wouldn't really be as much of an issue if you were able to torque the screw sufficiently, but I still haven't been able to figure out what bit size to use on the screw. It appears to be a Torx head, but a T10 is just a bit too small, and a T15 is too large to fit. A 3mm will fit but is also just a bit too small...thus preventing you from being able to exert the proper torque to tighten the screw before the hex or tox bit slips. Just installing and removing the stock a couple of times on different rifles has rounded the screw head enough that it won't be long before it's unusable. I'll be making a trip to the hardware store to see if I can find a hex screw to replace the threaded, screw-shaped piece of cheese included with this adaptor (and eventually order the Haga adaptor when it comes back in stock and sell this one).