Update: Able Track trackball

Awhile back I rejected the Able Track switch-adapted trackball in large part because of its lack of a middle button switch jack. That design oversight was recently corrected, and Mabatech now sells a 3 switch (mechanical) trackball. (My other con was that mechanical trackballs are harder for me to push.) It is the third switch-adapted trackball I know of that offers switches for all the buttons. The others are the Roller (mechanical) and the modified Kensington Expert (optical). If you require an optical trackball for easier movement, your best bet is a modified Expert or, if that’s too bulky, plugging in a separate switch interface with your choice of optical trackball. A separate switch interface also offers potentially more advanced button programmability.

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