Hey everyone, my apologies in advance if this has been discussed, I sifted through all 64 pages and tried a few searches but, didn't find what I was looking for.

I'm considering getting the 4PX. It would be to replace my Spektrum DX4R Pro. I'm a bit confused with the FASST and FHSS protocols when it comes to which is faster.

I want the fastest and smallest receiver possible. Which one is it?