When you get good and if you can handle some chatter, or are in a stable area bump up the sens to 99, disc to 4 or lower, and run in JE mode with 4 tone ID for super depth.
I stumbled onto below tests of the F75 and F75 LTD while cruisin Big Boys Hobbies website last fall and it turned my F75 LTD into a coin finding machine.
The first part talks about F75, the second talks about the F75 LTD. I played around with frequency last summer and it makes a huge difference. I was probably only detecting down a few inches on many outings due to my settings before reading this. I now mainly set disc 0-5, sens 99, GB +3, BP mode, 4 tone and the quietest frequency I can find. If its to much to handle lower the sensitivity before raising the disc. Good luck.
