The patented VTAF has several parts. A thin walled tubular steel precision VTAF Adjuster Screw with extra fine external threads slips over the tone arm mounting post.  For post mounted Rega tone, arms the VTAF Adjuster Screw is held to the tone arm mounting post by a thin walled capture ring threaded onto the threaded mounting post. 

For tone arms with a smooth tone arm mounting post, the VTAF Adjuster Screw is held to the tone arm mounting post with a pair of wave springs which provide a non-resonant connecton between the adjuster screw and the post.

For Rega 3 point mount arms, which have no tone arm mounting post, the top of the VTAF Adjuster Screw is attached to a substantial brass platform to which the 3 point tonearm mount is screwed in 3 places.
 

A precision machined solid brass VTAF Adjuster Wheel with knurled edge for thumbwheel action (2-1/4" outside diameter, 1/10 inch thick... 56 mm x 2.5 mm) runs smoothly on the extra fine threads of the adjuster screw.

A substantial bronze thrust bushing slip fits to the arm board hole and accepts the adjuster screw in a vertical sliding fashion, with only a few thousandths inch clearance, precisely locating the tone arm pedestal on the arm board.  The VTAF Adjuster Wheel bears directly on the top flange of the bronze thrust bushing.
 

Each turn of the solid brass adjuster wheel raises or lowers the tone arm pedestal by exactly 25 thousandths of an inch (.625 mm). Less than a full turn produces proportionally less change. An easy-to-see witness mark is provided on the adjuster wheel.
 

The tone arm pedestal is not fastened down to the arm board, but is supported by the bottom surface of the adjuster wheel resting flat on the precision top flange of the bronze thrust bushing, under the influence of gravity. Because the tone arm is essentially balanced over the pivot point, the tone arm pedestal naturally rests level, without any tipping tendency. This precise but non-rigid "floating" connection of the pedestal to the arm board is the key to better sonics from the tone arm.
 

A simple precision machined solid brass VTAF Vertical Guide Assembly captures a horizontal projection of the tone arm pedestal, allowing vertical motion of the tone arm pedestal, but preventing the pedestal from rotating in the bronze bushing. The vertical guide assembly adjusts smoothly and easily to minimize free play between the guide system and the pedestal projection.
 

The VTAF Adjuster Wheel raises and lowers the tone arm pedestal easily, smoothly, and precisely, with the record in play. The user can hear changes in the reproduced sound as adjustments are made.