I went to Powerbox Main RXer units 7 years ago and never looked back. Got a bunch of their Mercury SRS models with three Spektrum Serial RXers on each. You can change a PBox to any type of receiver(s). However, I am stuck with one Spektrum Powersafe in a BVM plane I bought. I too had a bit of trouble getting used to the AS3000. Got that turned off for now. But, ... You will love the IX20 once you get used to all it functions. There is a great forum thread on the IX20 over on RCG. Yoo may want to skip the first 300 or so pages because they pertain to earlier software versions, etc. Spektrum has several of the original and current development guys on that thread, and there are several non-Spektrum experts on there too.