Pete, (without the R, sorry!),
Thank you for your quick response. All the USB hubs are powered, but i will check the power management you mentioned. Good point, have not thought of that and it could explain a lot. When I start FSX, some USB could just come alive and FSX starts reassigning.
Preferably I would like to use all the controllers in the same FSX session, all at once that is. Sometimes I fly a fighter jet with the stick and 5 minutes later I am in the mood for some general aviation with the yoke. Sometimes I use the single throttle of the Saitek, but with multi-engine aircraft I use the GoFlight throttle and so on...
I have read the passage above three times now, and I am still not sure. Just to see if I am correct: is it possible to disable ALL controllers in FSX, clear ALL the relevant controller assignments in FSX and assign all axis and buttons of all the connected controllers using FSUIPC? If so, that would be great. Or am I overlooking something here?