If the TT is not meeting your expectation then I guess you upgrade it. If it is, is far more common to just upgrade the cartridge.
I have two tables - one is 5 years old and another 38 years old. Both have seen their fair share of cartridge upgrades and I have never given any thought to replacing them.
I have two tables - one is 5 years old and another 38 years old. Both have seen their fair share of cartridge upgrades and I have never given any thought to replacing them.