Realredrebel,
Pattern 1 discrimination for blanking out iron.
Occasionally I will change to a custom pattern leaving only the top right quadrant open for copper, silver, bronze, and lead depending on the ground conditions.
Auto noise cancel. I do this with the coil on the ground, not a foot off the surface. It makes a difference.
As for sensitivity, I use auto level 0 to +2 depending on conditions. The processor is fast enough that you do not need to run -3 to -1. This is only for finding surface coins while moving the coil at a faster speed. I would not recommend +3. The processor has a has a hard time keeping up with +3 unless you are searching for very deep targets in a clean, non mineralized soil while moving the coil at a very slow rate. Generally, manual sensitivity is between 23-27. If you are using the 17" coil, 21-25 is a better option.
Only use ground balance while searching at courthouses or churches, where mineralized soil is common. For parks, fields, and beaches it is not necessary. Areas with deep rusty nails from construction require ground balance. If you need ground balance, read the manual.
I have wireless turned off, even though I use AKG k840 wireless headphones.
I keep gain at 24. I like a quieter hum, so I use 15 for threshold.
Keep volume limit at 30 and pitch at 15.
Mode 1 - coins. I use an edited mode slightly different from mode 1 depending on the conditions. Normal response with fast and deep recovery.
I use ferrous coin for churches and courthouses.
Ground coin for parks.
I hope this helps!
Brian