You're welcome! Correct, at this time V1.1 is the latest.

So has anyone tried any of the telemetry sensors? I want to try the temp sensor for the motor (electric) figuring it would be better than trying to temp it after a run.

An update on my 4PX issue where I could not bind to a receiver.

I sent the radio and receivers to the distributor in Australia. He took it out of the box, paired it up with the receiver and it binded without issue. He said that the throttle control was wound fully to one side and some of the other settings were a bity off, but apart from that it worked fine.

I mentioned to him that my motor is reversed and I had to reverse channel 2 in the radio for the throttle (which was why the throttle was all the way to one side when he turned it on). He told me that I should reverse the motor settings in my ESC, not the radio. Otherwise all of the other settings can get mixed up in the radio.

I checked the specs on my ESC (LRP Flow Competition ESC) and found that you cannot reverse the motor in this ESC. The manual suggested that reversing the motor should not be done for the sensored motor and ESC. Perhaps this was the cause of my issues.

My radio is being sent back to me. I will replace my ESC with the SKYRC 120A ESC that supports reversing the motor. I will see how it goes and post an update.

I noticed some discussion on batteries going on, and I had a hard time finding a battery when I bought my 4PX, so figured I would share what worked for me. This NiMH pack is pretty affordable and easily lasts a few race days without needing to be recharded. So far I'm really pleased with it:

Sanyo 6V 2150 NiMH Tx pack

Nice part was my existing peak charger can charge it.

If the electric motor you are using is three wire, all you need to do is swap two of the power leads from ESC to the Motor. Doing so will achieve the same thing.

Unfortunately the motor is sensored so the wires cannot just be swapped.

OK - So, what did the Austrailian distributor do differently than you did to get the RX to bind to the 4PX? Sounds like he simply followed the procedure and it worked for him.

I'm not following why you can't simply reverse the function of Channel-2 for the ESC within the 4PX. Once you do that, recalibrate the ESC by following its procedure outlined in the user manual for the ESC.

What kind of car is it in?
If it is shaft driven just turn the front and rear diffs around.

The car is an Associated T4.2 2WD.

The distributor plugged power into the RX and it was already connected to the radio. He didn't have to go through the binding process. I may not have explained it properly in my previous post.

I also don't understand why you can't reverse the channels in the radio, as I thought this function was available to help with a reversed motor. However, the distributor told me that it could have caused issues with this setup and my ESC.

What car are you using this in?

I'm looking for a little help please. I read through a bunch of pages here and am looking for a clear answer.
I plan to order a 4px today, switching over from a Spektrum dx4r pro. Anyway, I run 1/10 TC and 1/12 onroad both indoor and outdoor. I need 4 receivers, which ones I buy? Thanks

R304SB or R304SB-E

Thanks. Are the 204's no good then I guess? Also it seems I should get a battery pack for it? Any recommendations?
Thanks again

204 receivers work, but the fastest frame rate comes with the 304. Also, the 304 has the ID code in the receiver so the car can't be run with the wrong model selected in the radio. Like spektrum has been doing all along. With the 204 if you turn on 2 cars with the 204 Rx the radio will run them both at the same time. With 304 receivers only the selected model runs.