I had a TD 166 MkII for about 18 years. They are good decks and can stand a bit of upgrading when the bug bites (as it always does). A simple upgrade is to purchase the metal subplatter and spindle from a TD 160 and substitute it for the plastic one originally fitted. Tightens the sound up no end, as does adding some damping (rubber pads, plastecene) inside the plinth. Also, remove the wooden bottom board completely, it causes reflections inside the plinth. Happy listening!
Lenco '88', Kuzma Stogi S, Decca London Super Gold
STD 305S, Jelco 370D, Denon DL-103 with Alu pod
Pink Triangle LPT, Rega RB250, Digitrac 300SE
Trichord Dino+, Audion Sterling, SD Acoustics SD-5