more curiously, why aren't you using KO's own 2.4?
haha i'll get around to picking up a UR set one day as am big KO fan,
got every EX1 since 1981 AM till about half-a-doz of the Mars/R in FM
... they do run noticeably more energy-efficient on Spektrum modules
now got so many Spektrum RX it'll be hard to uproot,
so any UR will just be for the show shelf