Hey Paul,
Unfortunately, you cannot interface your Tx with RF6.5.....you can with Phoenix. I use my JR10X on Phoenix with no problems. I have RF6.5 also & I just got the new RF7 at my LHS on Thur(12/19)& got the "Interface"(No Tx) edition & NOT the "Interlink"(W/Tx) edition so I can use my Tx. I set it up with my 10X & it works flawlessly as it does on Phoenix. Also, I was able to easily add the RF6.5 MegaPak to the RF7 database with no problems. It all works well & some great new features in RF7. Here's the link...
Denny
http://www.realflight.com/products/gpmz4504.html