2.4 is more convenient than 72, but experience has shown that it is definitely not interference free. PCM was always the most reliable choice and now that nobody else is on it, it is bullet proof. And since you already have it, it's also free.
I use 2.4 for my foamies and PCM for anything large or expensive.
Jim
Interesting Jim.....I have a LOT of 72 rx that's for sure!