Hello Bryant,
I am a new F5 user as well-- only two weeks into learning the thing. From what Ive read and what Ive experienced, I would suggest the following:
Your Disc might be a bit too high. I have not turned mine up past 5 at any point so far.
If you re maxing the Gain, do NOT bury the knob as far clockwise as it will go-- I have read that you will lose a good amount of depth this way. Just turn it until you get to 99 and stop. I personally hunt at 90-95 just to make sure i don't inadvertently bury the knob all the way while hunting.
If you're hunting with a partner and he "detects" something, go over and see how your machine responds to his target before he digs. If the F5 doesn't pick it up, mess with the disc/threshold/gain setting to see if you can get it to. Note the tone and the VDI number too. See if you can get both machines to agree on what it is based on tone and number.
I have read that the F5 will lose tone quality on deep targets if in the 3 or 4 tone mode. The 1-2 tone mode performs better.I have not expereinced this yet, but I also havent retrieved any items more than 7 inches or so.
From what I have read, optimal settings for gold are very different than the optimal settings for silver. That doesn't mean you cant find both with a single setting, only that the machine works better for each metal individually than it does in a "catch -all" setting.
Finally, there is a compilation of posts and reviews of the F5 put together by "Sven" here on this forum. I'm sure there is a link to it somewhere in the last 2-3 pages of posts here. In it, Mike Hillis and other f5 users have described their techniques in great detail and I have found this very useful in learning this machine.
Hope this helps. Don't let a Garrett user out-hunt you!
