The switch will not have any input in the reduction of RF. I don't know of any that actually have any RF reduction qualities.

My feelings are that if all the connections are tight, clean, and secured RF will not be an issue at any switch location. Few RF problems are actually directly associated with current solid state ignition systems. It's almost always some other component that's the cause of problems. Unfortunately, it's also usually the owner that caused the problem due to poor assembly methods or old and worn out equipment.

Those that are making the transition from glow to gas usually learn the hard way that the methods they used in the past need to be upraded a bit. Secure electrical connections, tight fitting clevises, Locktite on all nuts and bolts, better receiver padding/isolation, antenna routing (that's a BIG cause of problems!), higher end equipment (another big cause), servo checks, stiffer linkages, etc., have a larger impact on RF in gassers than battery and switch locations.

Just my opinion, so don't load up the weapons just yet