We HAVE winner!!!
Nice job.
Now, how could I find myself one of those dual throttles???
It's a Suncom SFS Throttle. Suncom went out of business years ago, so you are going to have to look for a used one (if somebody has one new in the box, it will probably be priced just slightly lower than a Van Gogh painting).
The Suncom SFS throttle is an old analog game port and keyboard device. To make it into a USB device will not be trivial. There is an excellent (but old) thread on converting Suncom sticks and throttle to USB over in the X-Plane forums:
http://forums.x-plane.org/index.php?showtopic=27496It is a 15 page thread, but if you want to undertake converting Suncom controllers to USB, there are ome real gems in there.
Of course, Hannibal's specific approach (using a board from a USB joystick) is proven to work, but you would probably still benefit from reading that thread. One item that was a bit surprising is that NONE of the buttons (switches) in the SFS throttle are seen by your computer as joystick buttons. They are all feeding into a keyboard emulator.
I'm still thinking about converting mine, but I'd probably use a Leo Bodnar board. With at least 3 major game controller manufacturers offering split throttle controllers now (Logitech), or in the near future (Saitek and Thrustmaster), it's getting a little less tempting to take that task on. Time will tell.