Bought a Tesoro Tiger Shark, any tips?

I've had my Tigershark for just over 2 years now, great machine. I ran a Tesoro Tejon for about 5 years now so the language of the beep and dig machine on the Tigershark was easy for me. You will have to take it out and use it to learn it. I run mine with the disc between 2 and 3 usually, that gets rid of most iron but still allows the machine to hit small targets. At that setting it will hit on things as small as a single .177 pellet. The concentric coil is much easier to pinpoint with than the AT Pro and the Tiger will ground balance in wet salt sand where the AT Pro won't. Like most Tesoro machines, the Tigershark doesn't loose depth when you raise the discrimination level. Purchase some divers silicone grease and keep the rubber seal clean and lightly greased and you won't have any leaking issues. My Tigershark has the 8 inch coil, it is easier to use in water but it probably won't go as deep as an AT Pro, the 10 inch coil may get a little deeper. It also hits on small gold chains that your E-Trac will probably pass right over. Have fun