Finally got everything hooked up. Fired up the Extra, and made a couple of patterns. IT'S FUN!!
Not bad for a first try, and lots of tweaking still to be done.

Have a look at http://www.simprojects.nl/diy_motion_platform_ii.htm (at the bottom "Test Flight" video)

Also updated the electrical drive page. http://www.simprojects.nl/electrical_drive.htm

Roland