I was thinking of getting a 10x12 and was wondering how it handles interference , I heard it was not good , apparently the deal on those coils is over now , i got a cold reception from kellyco and was told it now is 179.00 plus 14.95 shipping and i was reminded that in time past i returned two coils , so i would get no break this time the other coils worked badly on my M-6 so i returned them so I am a bit reserved about spending that much money and finding it may be just some hype wish thear was a coil library . as for kellyco they have not made a costomer of me but the revers but since they are the only ones who have it i may buy one anyway provided i get the facts first,