Oh crap! How bloody frustrating... Let me think -- is there any way we can simplify the problem for say, just the tilt Radian servo? The pan is not an issue right now, and we'll get to the roll later. Apologies if I am asking you to confirm the obvious but on the new laptop you installed the FTDI Virtual Com port drivers without any problems? If so, then for the tilt Radian servo: 1. Mount the belt (the servo cable will not be connected in the next step so it should not operate) 2. On the tilt Radian, disconnect everything but: a. The servo cable coming from the pan Radian module (to provide power) to Port 1.b. The programming connector on ports 5 and 6 (double check the orientation of the 3/2 connector).3. Power up the gimbal so the tilt Radian servo is also powered up. 3a. Note the state of the LEDs after five seconds. 4. In the Device Manager, confirm that you see a COM port for the Radian USB adapter (under LPT & COM if you're using Win7 which I presume you will be). 5. Verify the COM port number. (If in doubt, unplug the USB connector to the laptop and the COM Port will disappear from the screen.) 6. Start up the Radian software, and set the COM port to what you found in 5. 7. Attempt to connect. I have seen issues (albeit it Mac/Bootcamp/Win7) where I have had to try several times. Let me know what you find: a. LED state in 3a. above. b. COM port OK? c. Does the Radian software connect to the tilt sensor? If not, I'm leaning strongly towards (a) asking Tabb and/or JohnC's opinions, but it starts to sound like (b) a pair of bad sensors. What I don't get is how you can upgrade the firmware, determine that it's 1.02, but then not talk to the sensor to program it....that makes no sense. If you think it would help any, take a close up image of the connections on the tilt module and post that, and/or shoot a video of the tilt sensor LEDs so Tabb/JohnC and I can see it. Andy.