Yeah, that was the smart move. Not sure if you went with the 2S or 3S, but I personally would do the 2S, save the money towards an extra rx and be good to go. Otherwise your just paying for an extra channel you will never use since they both have all the same identical features. You will love the Spektrum radio regardless.

It might be a little to late, but here is a interesting review.

http://www.bigsquidrc.com/futaba-4pl...-radio-review/

I have been looking at the 3s, 1. because I didnt realize the 2s had telemetry also, and 2. I thought an amb transponder would use the 3rd channel. Is this true or not the case? If I only need the 2s and can still run an amb transponder, that will be nicer on the wallet.

I read that but I reallly like that Spektrum has built-in telemetry.

Its interesting, but it lacks alot of information and detail.

Few points Ill make.

A. Any of these tx's will survive a few "opps" drops, LOL!
B. Any 2.4gig transmitter will give you 1000 feet of range and great signal lock in the countryside where there is no radio interference. My AE XPSS rtr 2.4gig tx/rx set will give me that type of range at my camp.
C. Review was quite limited, LOL! Dissapointed it didnt go into features in detail.

You just plug the transponder into a free slot on the reciever, be it the 3rd channel or for a 2 channel reciever the "batt" slot. You can also just use a Y splitter to plug it in. But you will be fine with a 2 channel 2S system.

The 4pl won't, the plastic wheel stops inside the case will break off if you look at this transmitter the wrong way, and as I found it's a nice way for Futaba to weasle out of warranty.