I live in louisiana,and the minerals in my area are next to none,i can run my coin$trike th at -1 and my sen at 9 90% of the time.I like my c$ a lot and as for as how deep it hunts i have no problem pulling coins up to 9 inchs as long as i run my th at -1 and my sen wide open.Its not like i am having problems with the c$ because i have read read and read many many post from the old timers and ofcourse from BILL LADD which has helped me greatly i can use this detector with ease. I used to own a cz20 and when i first picked the 20 up within 10 hours i could tell you if i was on a coin or a pulltab i know the cz are very easy to set up and go to where it takes me a little longer to scroll through the system on the coin$trike.I also have a new 12.5 inch coil with the same pins as my coin$trike so i put the coil on and pluged it up then i turned my coin$trike on and the unit works.Ofcourse i was in my house and i never tried it outside does anyone know if this coil will work or will i burn something up with this 12.5 acel coil.The reason i was wondering about the 3d is because someone was going to trade me for my c$ but he decided to keep his 3d so i guess it really doesn't matter now.I wish BL would make a video with the coin$trike HINT HINT. THANK YOU ALL AND HAVE A NICE MENORIAL WEEKEND,ONETON