I bought an F44 a couple years ago, and it has since been relegated as a backup to my XTerra 705. I have seen HunterGT's videos on using the new Magic-13 coil from Russia (MGC Labs) using the Tek G2, and a couple more from Europe using the F11 and F22 and was considering trying one on my 44, for coins and relics. It is a 13" round DD coil, and there is also a 9"x13" DD. With each priced under $100, I figured it is worth a shot - anyone have experience with these? I think they've only been on the market for just over a year or so.