To Stalker,
You can bump the sensitivity down without losing depth. Drop it down to 6 or 6.5 and try it. You may find out you are finding more targets at this setting. Try a wooden cane and detect with the arm opposite the brace and scan as far out in front of you that you can comfortably or off to the side. If you're picking up your brace you have the sensitivity set to high anyway.
There is a long running myth about sensitivity and equating it with depth. It is not a depth control. Turning it up does not drive the signal deeper into the ground as many think. It just makes the coil more sensitive to the targets you hope to find but it also makes it more sensitive to everything else in the ground including mineralization - and in your case your leg brace. I never run mine high unless I'm in a big, open, area that is clean. Mine remains at 6-7 all the time and I've pulled coins at ten inches at that setting. You would be more than surprised at how many targets you are walking over with high sensitivity masking them.
Bill