Hi guys: just sprang for the 8x6 SEF butterfy coil.for my v3i. for the high trash and ferrous junk that I'm dealing with here in Pa.Any thoughts or comments on how to set er up for the m/d would be helpful.I read the posts inre the benefits of a smaller coil and my interest was piqued as a method for dealing with it's effectiveness in high trash and pinpointing in these ares.Thanks.... Jack from pa.