The AT666 A very successful system of bonding record and platter, flattens records with a 250 kg pressure. The platter is a 30cm slab which weighs 1,4kg, thus adding 1,4kg to the record for an even higher dynamic mass and improved rotational accuracy - not for wimpy motors. Overall thickness is 9,5mm; the AT666 can be installed on turntables with a spindle at least 11mm high. 

AT666 can be available in two versions: with a manual suction unit and an automatic AT666 powered by 2 batteries, worth $100-120.

The AT666 allows the sensible MC cartridges (and MM) to follow the groove completely unaffected by warps. 

A rebadged AT666 was, by the way, made available by Nakamichi for the TX-1000 under the VS-100 moniker

The AT666 may be available with AT-618 or AT-638 Disc stabilizers, worth $70-$120.