I havent found much info on this. to anybody that has the 4px, does the orange rxs still work with that radio? im not looking for someone to just tell me go out and buy genuine futaba receivers without actually knowing if these will work.. do these receivers such as the Orangerx ground receivers gr400s and gr400f work with the futaba 4px yet? the gr400f is c1 and c2 mode fasst compatible. how about the gr400s?

The 4PX is compatible with the FASST, as well as the FHSS / S-FHSS / T-FHSS receivers.

I have a 614FF, 614FS, R304SB, and an R203GF bound to mine.

Looks like the GR400F is FASST, and the GR400S is FHSS. If they worked with the 4PK, there should be no problem with the 4PX.

well i ordered a couple of each of the gr400s and gr400f and all of the ones i tryed they worked when i hooked up a esc , motor and battery to make sure they bind and turn on. the gr400f version bound with in a few seconds. the gr400s version took a little longer bound did bind. i will have to install one of them in my stampede and try out my new 4px radio. woo hooo

Any updates on this? I'm thinking of getting the GR400S, but can't find much info on them.

the 4PX works with FASST c2 recv

the actual futaba r304sbe, IMO,the best surface recv for 4px is $49.99..........

yes i have one in my stampede truck and it works fine with my futaba 4px

Thanks for info

Up date on my gr400f. i have not used my 4px for a year or two. When i tried to bind it with the gr400f receiver its a no go. But the receiver does bind with my futaba 3pk transmitter with fasst c1 module. I assume the receiver only operates in c1 fasst and not c2 fasst mode. the futaba 4px does work with my gr400s receivers ad the t-sfhss receivers i have just fine.