The invention relates to a continuously variable transmission comprising a driven rotary part, a chassis or housing, and a driving rotary part. The receptacle has a first end and a second end opposite the first end. Next, the amplitude levels of the detection signals from the respective detection regions are measured, and the gains of the respective focus servo drive amplifiers are adjusted individually so that crosstalk can be cancelled based on the measured amplitude levels of the detection signals. A lock tab on the case engages mating recessed seats on the fork for securely retaining the fork relative to the case in each of its stored and deployed positions.