Looking for thoughts from Nottingham Analog table owners

I should add, the Linn Basic was a big improvement on my previous Rega. So the NAS Mentor was >> Rega.

Not hard to set up. Just make sure that you set up on a dead, non-resonant shelf, like Baltic Birch plywood, or better, panzerholst. And I would avoid the NAS arm unless they've improved adjustability a whole lot. But with the Trans-Fi air bearing arm at $1000, punching at 5x it's weight, why use anything else?

Consider the Trans-Fi turntable while you're at it.

Before buying NAS, I had bought a Lynn Basic, because I thought the LP12 was not sufficiently better than the Basic to justify the price. Then I heard a NA Hyperspace, and was sold.

So I talked with Tom Fletcher (owner) at NA, and I ended up buying one of the last Mentor turntables (Dais bearing), with Mentor arm and Tracer 4 cartridge. Wow!!! Dead quiet, elegant, neutral sound. Wow.

The Tracer 4 was not misnamed - it's never mistracked anything. But that Mentor arm - solid but not in any sense adjustable. I moved to a Trans-Fi air bearing tonearm, sold straight from the factory for $1000. Now THAT's adjustable! Wow!!!

Replaced the plinth with an aluminum/plywood/aluminum sandwich. Wow!!!

Now I use my higher end Koetsu all the time, because that's what it takes to bring out the best of a really high end cartridge.

My modified Mentor was the best sounding TT I had ever heard, until I finished my DIY air bearing unit. So I really think highly of that brand. The Dais bearing is something else. I don't think you can go wrong at any price point, although I would try for a Dais if I were you. 

Uber, an alternative suggestion. Don't know if you use US cleaning, but if not, that would be a big improvement. Another big improvement would be the Trans-Fi arm; that would leave you with enough extra to get a torque screwdriver to optimize cartridge mounting.

The change to my NAS Mentor (early model replaced by Dais) from NAS arm to Trans-Fi air bearing arm was dramatic. My NAS Mentor experience was, and is, very good, and only beaten out by my DIY air bearing TT. I have nothing but good to say about Trans-Fi and their air bearing arm - I now have two of them, one for each TT.

Sounds like a motor problem.

Have you lifted the motor pod by the motor pulley? If so, the motor may be gone.

If not, carefully position the motor where it's accessible, LIGHTLY grasp the pulley and LIGHTLY try to move it back and forth. Do not attempt this unless you can use a light touch, what engineers call 'good hands'.  If there is discernible play then the motor sleeves are worn and it should be replaced.

Otherwise call the factory and ask. IMO

Good luck.