Originally Posted by
Stubbs
^^^^^ THIS!!! ^^^^^
I love the 3D trigger on the KO Propo. Really wish Futaba would do something similar, but I'm sure there's some copyright / patent issue to contend with.
As far as the 7PX goes, I think it's overkill for racers. We need, at most, 3 channels. Now, for scalers, crawlers, etc...., that need to control a bunch of discreet functions, or mix multiple channels together, this might be awesome.
For the rest of us, the 4PX is still more than enough.
Heck, I've still got my 10 year old 4PK....it's the radio I keep in the house for using on VRC Pro. 
i still have my first radio: 3pks 2.4ghz hahahah, in the last 10 years has it skipped a beat