I'm in Wishaw. If you are near-ish, I could have a look at it.
p.s. I note the nut is not fully located to the bottom of the slot. Personally, I'd get back in touch with the vendor & get a replacement. G.
One annoyance is the fact that double action truss rods are still being made with brass nuts. Why? If someone ruins the soft metal nut, then, basically, your whole guitar/bass neck is a total loss. This happened to me with a Peavey I had. Nut was well mangled when I got it. I didn't know it was a 2-way. Modern truss rod nuts need to be made from hard metal since they are non-replaceable.
I might have some spare in the cupboard. Be tomorrow (Sunday) before I can check. This is the stuff that glows in the dark when exposed to UV light - right?
I've one of these - apart from my (real) Overwater Fretless. It's my go-to bass, always at hand. Bought from GuitarGuitar in Glasgow for Not A Lot. Highly recommend - if seen, try it!