dbackus Heliman Location: Glendora, CA
| I thought about this a little when I mounted mine. Remember you remove material from the fan and then replace material with a magnet.
Also, if the hole is already there (like my Sceadu). You could imagine it is already out of balance and this fixes it by plugging the hole.
In answer to your question... I have no idea, but the above is what I concluded.
Derek |