Today I connected the Connie throttles to the USB analog input controller and after some playing with the settings and adjustments.... it really works.
It's a great feeling to push the throttles forward and to hear the roar of the engines from the speakers. The adjustment is a bit tricky because there are two locations where it must be done. First you do it in the settings of the MS-FlightSim, then again in the settings of FSUIPC. And don't forget to assign the axes to the correct joystick! If there are only two joystick devices (at the moment) it's easy, but if there are three and more devices, you have to concentrate on what you do :-)
I'm happy that it works because the TRC-Simkits analog input is designed for 10kOhm potis and I'm using 50k because I could not find the right ones. To correct the resistance I connected two 20k resistors in parallel to the potis, this gives a total resistance of about 15kOhm and that's fine.
The only disadvantage of this trick is that the travel of the throttles is not linear anymore. The response is a bit flat around the center position but that is no problem.