There are quite reasonable costing methods available to be considered that can move your TT on in advanced Tech.
A LP12 Motor can be adopted for use.t
The Old Power Supply PCB Board can be swapped out, this will give a Board built from components not at risk of age related issues.
The Platter Spindle Bearing can be serviced.
Linn in their latest £50Kish TT, have now got on board 'pardon the pun' with using Resin Impregnated Densified Wood produced as a Board Material for their support structure. It is almost certain the product being used is Panzerholz or Permali.
For your own TT a Board Material such as P'holz or P'mali used as the Plinth Blank, to be used to create a New Structure can be acquired for approx' £300.
Working on a TT's Supporting Structure will also bring very impressive results.
Some of the above suggestions utilised will give the user assurity the TT is in the finest of fettle.
All of the above suggestions utilised have the potential to produce a TT, that will easily be able to get best from improved TA>Cart' assemblies, and I will be surprised if it does not take comparisons on TT's with multi £0000's attached to show it a clean set of heels.