ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
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Allan:
I've never had any problem with happ's at any angle, although I
haven't mounted them upside down!
A cheaper alternative is to use a regular trackball and either make
custom covers or just disable the left/right/center click.
>
>
Jeff Courtman
Director of Exhibit Development
Museumscapes
1002 North Central Expressway, Suite 549
Richardson, TX 75080
Office: 972.231.0002
Cell: 469.831.2256
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