Olinco, you can probably remove the recommendation of RF filters. According to what I have read on Horizon's web site they are pretty much unneccessary for 2.4 systems.

One precaution though is to not use the PCM Y-cables as they can cause issues on 2.4.

Just place fuel pumps, etc a good distance away from the receivers on Spectrum and all will be fine. The fuel pump is by far the noisiest part of the turbine electrical system. I have nearly 200 flights on 2.4 now and about 150 of those on turbines in several different aircraft. Just keep the main receiver and remote receivers away from other components and the system works great...Gary