So I decide to try FW 8.8 alpha yesterday (USB data cable) and it won't connect. PC recognizes something got connected but PC program won't connect to JB4. Not the world because I'm pretty happy with where it's at and the JB4 is definitely still doing it's thing when driving. I pulled the cable to check continuity and it seems fine. I saw a bend the pins for connection video and may try this or try and tighten the board connector sockets. Anyone else have this specific issue? Does the bend the pin fix work if your PC already dings when you plug in the USB. Same laptop I've used for all other JB4 logs and adjustments.
Can't really answer your question because I've had the BT module the whole time, but consider getting the BT module. Being able to use your phone for a display and to log/map change is really nice. I think I would have sold my JB4 if I didn't have the BT module for it.