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[Yoda]

Martee wrote:

Yoda wrote: Martee wrote: Yoda you have mail No mistake here, Martee. For the vertical plane of rotation, the hinge pin is positioned vertical to a vertical plane. Can't buy it. For vertical rotation, the hinge pin must be horizontal to the vertical plane, at right angles, perpendicular.

Martee,

For vertical rotation, the hinge pin must be vertical (perpendicular) to thevertical plane. You can't be "horizontal" to and"perpendicular" to it at the same time!