I came from the E-Trac to the V-3, its like night & day....
I am learning the V-3, the E-Trac was easy because I had used the XS,EX.2. SE and the ET was a little diferent.
I think you may have hurt your self with the big coil and high sens.
There are people on this forum that can help you, if you want to learn.
One thing that I have learned with any unit, and that is, start out with a smaller coil than stock.
Also, the V-3 has so many adjustments and if you don't set it up right, your going to have problems.
Sweep speed is very important, and the V can be set up for different sweep speeds, but with that big coil, I don't know,
I have not hunted any place that I could use the D-2 coil or a 9.50 coil, or a 6x10 coil. The places that I hunt are real trashy,
so I have been using the 5.3 and 4 x 6 coils..
If you give these guys a chance, they can help you, if you want to learn the V-3, if not,sell it and move on....
HH...BJ