I'm wondering exactly how I can change one of the resistor values slightly, I assume you mean to swap one of them out with another resistor? If so, then that may be hard for me as there is nowhere nearby for me to get resistors from. I'm pretty sure the wiring is alright, but I'll re-do it again just to be sure.

Another discovery I made by the way was that when I used the OrangeRx receiver from my FW, the central point was at the -12 position on the transmitter, while on an identical receiver I purchased for my BW, it was at -17. For the record, I'm using a Devo 7E with Deviation software if that can help anyone to figure out how to modify dead zones on the transmitter, though it seems that there is variation with the receivers in this case.