ohhhh, ok. now that I see were your going with this, I have a much more clear mental picture
.....I think even I could do this.
The way I under stood it you were converting your transmitter to talk to a usb mounted wireless mouse receiver, as I have a wireless mouse by Lodgetec it's what I immediately thought of. I had forgotten they even made corded mice these days
On the other hand what you basically did, was stuff the X & Y joystick pots along with there respectable electronics into the transmitter to serve as ch 1. & ch 2. (correct?) You then will close up the transmitter, with its new usb cord hanging out, the computer will recognize it as the joystick as if nothing had ever happened(right?) While you practice your driving skills with a properly shaped controller
I like it
If I may make a suggestion, when you reassemble, install the battery tray and run some dead batteries in it so it will have the proper weight balance .