I am thinking of upgrading the stock coil on my T2+. I have looked at several brands but i am leaning towards the Mars Tiger coil. I would like to have a little more depth but most important to me is the target separation. I have also looked at the Detech coils. Price wise they are pretty much the same. I also looked at the Mars Discovery coil but i'm not sure if i need to go that big for the type of MDing i do which is mostly relic hunting at old home sites, in the woods and sometimes at parks. If anyone has ever used a Mars coil i would love to hear some feedback on how it performed or if there is another coil that you would recommend.