The only pertinent comment I can add here is what Meridian said to Nick and I at Bristol

There they said that they had tried many combinations and configurations and they found that it's possible to have too little or too much Ferrite...........and the way it was packed or configured was also a factor

As regards "Recommendation", I prefer to wait until Meridian hopefully release modified ID40 Cards or some other Mods to the MS600

I have also tried some commercially available Ferrite Filters from Maplin...........2 on the RJ45 Cable just before entry into an ID40..........and I think it has made a small, but noticeable difference.......and that is after a lot of other steps to isolate the Sooloos components from all other Network devices on my Network

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