@Len, I have a few power boxes with my Futaba systems as well, a bunch of Royalss, competitions, and mercury. They have been flawless. Usually wherever possible I will use dual receivers.
With the new SR2 versions The larger power boxes can no longer support 4x Spektrum rx. This is part of the reason why I just went to the powersafe.
@f900 i’m glad to hear of your good success with the Spektrum setups. i really believe and have seen most systems are successful and problem free for the majority. 👍
Voy