Thorens TD 166 MkII with SME tone arm


I'm planning on upgrading my TD 166 Mk II with an SME 309, IV or V tone arm. Has any one done this? any advise? I haven't bought the tone arm yet.
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Again the stock arm properly cared for and setup is quite good on the TD 166mk2 mine sounds excellent with a Grado black a real cheapo..but will accept many finer cartriges to say the least..great arm "bad advice" sometimes...
This is nonesense the Toanarm on the stock TD 166mk2 is excellent IF you take care in cartridge matching and the arm is in good shape to start with..Thornes new how to make arms..this is a fact..save your money
SME 309, V and IV cannot be mounted on old sprung Thorens, or even LP12. The arm is too heavy for the designed load of the tables. Stick to light arms like the current SME M series or the older 3009 series.