Last week I pulled the wing off my Fun Cub for the first time. I both this plane fully built and know it flies well because a local club flier told me the maiden flight (and it's only flight) was perfect.
One thing I noticed is that the servo connections are run through and around a circular magnet about 3/4" in diameter.
I recall this is done to reduce electrical RF 'noise' (I think) but have never seen it mentioned in any build forum.
I'll post some pics later today but I'm curious about initial thoughts.