I recently decided to give coin shooting a try, so I dusted off the Eagle II,(blue case) I got from my father a number of years ago. It seems to work fine. It has the Blue Max 9.5 coil and is in stock form, other than the base I built for it. After reading all the Eagle II posts I could find on this forum, I think Iv'e determined I can run any 6.59 coil. True? Does the Royal 800 have an advantage over the Blue max 800? I see there is a 6x4 DD coil available. Would that coil lose much depth compared to the 5.3? I don't have any experience wirh DD coils on a VLF. I do know my 18"DD doesn't reach down like the 16" mono on my PI. So I guess I'm asking: Which other coil(s) would best compliment my detector for coin shooting? I'm not interested in going for the bigger, deep targets. I'll use my 3500 for those. The ground around here can be pretty hot, serpentine, but most of my detecting will be in topsoil conditions. Thanks guys.....................Marstin