Hey Fireguy, I can't say much about the SEF stuff, I've never tried it. but I have been very impressed with the NEL stuff, I own a Sharpshooter, and have ordered a Hunter for both my F-2 and 2200. I had the pleasure of using one all summer on a F-5,,I admire yer grit on the leave my detector out of it part of this thread,,,,You should use what you have and are comfortable with. who cares how much you paid for it. Anyone have a good contact for the SEF stuff I would luv to look into it. As far as the NEL coils, contact golddigger.com there here in the US.