BobCatEndeavors:
This project just went on hold for about 2 weeks. I have 2 radios, 1 Uno and 1 Mega. The uno and radio attached work fine. The Mega radio doesn't work on the Uno and the Uno radio doesn't work on the Mega.
I presume you are aware that the MOSI MISO and SCLK pins are in a completely different place on a Mega? They are pins 51, 50 and 52. And SS is 53. The SS pin must be set as OUTPUT for the Arduino to act as SPI master.
On what evidence are you saying that the Uno and radio work fine if you don't have a working radio on the Mega to prove that? Maybe I am misunderstanding what you are saying.
Have you tried the connection test (I think it's in Reply #29) in my Tutorial. It will verify whether the Arduino can communicate with its own nRF24. Of course it does not prove that the wireless part of the nRF24 works.
Debugging wireless problems can be very tedious. You must be very methodical.
By the way a couple of nRF24s is probably cheaper than 50 feet of CAT 5 cable.
And if you are buying more nRF24s buy an extra one for a spare against which you can test the other 2.
...R