Before she retired, my wife had to use a trackball due to carpal tunnel
syndrome. At least with those that we bought for home use, the ball was not
sequred in the device and, under negative G, the ball would fly out.


"Papa3" wrote in message
...
On Saturday, February 1, 2014 10:40:14 AM UTC-5, son_of_flubber wrote:
Your reaction seems defensive, but I did not attack. From a "maker" point
of view, I think that it is cool that you mapped the array of keys onto
the screen. But it is not obvious what that buys you compared to a
mini-trackball.


I thought this was covered not that long ago in another thread - too lazy to
look it up. In a nutshell, try using a trackball when scooting along on a
ridge at 100kts with +/- 2G bumps every couple of seconds. Not fun.
Key-based (up/down/left/right/select)controllers with positive tactile
response and discreet actions are SO much easier to work with. HOTAS
controls on military aircraft are a good example.