Robert
Tapehead
When you rebuild/refurbish/upgrade your TT with a 3rd party plinth, topplate, power supply, tone arm etc. would you still consider it to be a Linn Sondek LP12?
No, with the exception of the arm change.
It's a different turntable which happens to look like an LP12, for better or worse re sound.
Those changes are too fundamental. You can argue where tweaking stops and re-design starts and everyone will have a view but certainly if you start making radical changes to the sub-chassis, top plate and plinth which differ fundamentally from the original design (kiln dried hardwood plinth - pressed steel sub-chassi - laminated arm board - tidly bolts - two piece mazak platter - felt mat - synchronous motor - suspension) then that's beyond tweaking IMO. More so when you perform several of these changes at once.
The LP12 isn't a living thing - it has no spirit or soul which somehow transcends fundamental mechanical changes to the design.
On a purely personal note, an LP12 must have a fluted plinth IMO. It's a part of the classic LP12 look and it also streamlines the otherwise rather chunky, boxy looking design. By all means choose the prettiest wood you can find, but it needs fluting.
I've never really got the idea of transforming the old style LP12. It has a sound (one i like) and many of the official and unofficial changes simply make it sound more like other good TTs from Michell, Roksan, Rega etc, or even Pink, Systemdec or Logic of old who pioneered many of these changes long before they found their way into a Linn.