Looking for thoughts from Nottingham Analog table owners

Just looking for thoughts on my present setup.
Nottingham Spacedeck with what I assume is standard Spacearm. On that point I am not sure as it came with the tt which I purchased used of eBay.
Running a Shelter 501 mk3 cartridge through a Gold Note ph10 phono stage.
Now I am very happy with the sq but as you know...changes are always calling out...lol.
So what would anybody consider to be the weakest link here? The cartridge or the arm?
And suggestions for either or just leave well alone.
Btw I did research the air bearing arm and really do not want to get into that at all.
Thank you

I have a NAS Interspace Jr. with Ace Space 9 " arm and Audio Note IQ3 MM cart.  I've been told that Goldring builds these cartridges to Audio Note's specifications.

I am pretty sure there is not much wrong with my present setup but you know how the grass is always greener.....
But my recent upgrade to the phono stage did pay off big time imho so there could be more to have in the arm/cart area for sure.

So I have just seen a Nottingham Hyperspace deck for sale here and it says it has the Ace Anna carbon tonearm on it.
Looking at the close up pictures that tonearm looks absolutely identical to the tonearm on my Spacedeck.
Although I really do not see the difference visually between the Space arm and the Ace Anna arm just by pictures
What tonearm would have been standard on the Spacedeck or was there no such thing as a standard tonearm from Nottingham?
Very interested as would really like to know what tonearm I have.

Well last night I experienced exactly what my original OP had concerns about.

I got set to play vinyl last night but before I had even sat down I could hear a fairly pronounced hum that was not there a couple of days ago.

Now yes I had been around the back fitting a newer Pioneer cdp in the rack so obviously had disturbed the cable runs somewhere. But here is the odd thing I had never paid any careful attention to how I had run cables from the tt to phono to amp previously as it never suffered any hum at all.

To fix though I had to remove tt to phono cables and very carefully reroute away from anything else at all AND add another ground cable from the phono to the amp to clear up the hum.

Now is it possible that the new Pioneer cdp has a noisier power supply or similar?
No idea tbh, just very odd.
But shows that anything can happen in this wonderful hobby of ours!