The urge to tinker is awash. What TT might better mine and why?

I have the same itch. I have an lp12 with Dynavector xv1t cartridge and AudioOrigami arm. I am very pleased with it and have tried other decks at costly expense and have always reverted to a well set up lp12 as it is so much more musical and dynamic than for example direct drive decks. I have a Tom Evans Groove + and from discussion with Tom I am upgrading to a Mastergroove. The point of this is to get as much as I can from my favourite equipment so I have a base level of high satisfaction  to value other options. Different records have different needs so I am interested in switching options.
I have tried a number of other phonos and none comes anywhere near the Tom Evans in my view for a number of reasons. I am running a bespoke high quality hand made switch box to put other turntables in my system for easy AB comparisons. I have heard the suggestions re GL 99 (?) above and was surprisingly impressed for the price ,so I am having a bespoke plinth made for 3 arms with the GL99 with 3 vintage arms and cartridges for fun. Will be ready maybe Jan 19 so that is something to look forward to.
What I am saying is basically max out (my suggestion is look at the phono stage first?) what you now enjoy, or prefer, to obtain a level that you can use as a reference point for any options. I haven't heard your deck so I don't know how far you can take it.

I  have had the GL 99 modified as you can upgrade the idler and bits more than you can the GL75. I certainly think you will not buy a pig in a poke with a good condition GL99 and 479$ in the above advert is a steal if in good nick. I paid £500 for mine but it was refurbished in all super finishes and looks perfect /new

I too have the Technics 1200G. Anyone want to buy it at £2,250 + postage? I did intimate that a quality set up LP12 would be much more preferable to your Nottingham. For example, I would certainly not buy a Nottingham over the lp12 as I would need to spend much more  than that to improve on what I have already. I am saving up for a limited edition Avid turntable as I reckon that may be the logical next step up, but it is 4 or 5 times the price of an lp12.
It depends on whether your overall goal is to improve (subjective) or just have a different experience. In my view (and Tom Evans) a good phono is more important than a good cartridge - but just as difficult to choose, well not difficult  for me as I know what I like.

We are not, noromance was pulling your leg