Hello Everyone,
Here is a link to a line of devices that may provide a workable stop and piston control solution for some Hauptwerk users. They are add on push button units that can be programmed to send any combination of computer keyboard presses such as Hauptwerk keyboard shortcuts to your computer. The key caps can be relabeled using provided Microsoft Word templates so you can use your printer to genereate the labels. Different size and color keycaps are also available.
http://www.xkeys.com/xkeys.php
I originally purchased an "X-Keys Professional" unit to use with computer games and found it to be of excellent construction quality and very easy to program and use.
I now use a MIDI upgraded 1980's Rodgers console to play Hauptwerk, but previous to that I found that the X-Keys unit worked very well for stop and piston control. I don't think I have seen X-keys mentioned on this forum and thought it might be helpful for some.
Regards,
Steve