The Turntable I purchased a lifetime ago and is still with me (sort of) - the Rega Planar II - way back in 1981.
Since then I've applied several upgrades - to the point where the only original parts left on it is - the lid/cover and the on/off switch.
I started with relatively small "tweaks" - like the Michell Techno-weight, the Cardas Incognito one piece tone-arm harness upgrade, a ceramic bearing and the Rega Motor upgrade kit.
Then the more serious tweaks, such as replacing the plinth, replacing the Glass platter with an acrylic one, replacing the sub-platter with a high tech aluminum sub-platter and finally - replacing the RB250 tonearm with an Audiomods Series 3 Tone-arm.
I could have simply replaced the old TT - but this was much more fun!
It would be really difficult to part with it after that "journey" :-)
Regards...