I went back to Washington park this morning and this what I found.
I was Coins mode on my XLT I tryed the Coins & Jewery mode ok but it picks up stupid pull tabs.
I know those pulltabs are a pain (I got a couple big coffee cans full of the damn things) but you got to dig em if you want to dig up gold rings! Hit your wife up & drop a couple of her gold rings on the ground along with a couple pulltabs & see if there is any difference on your machines tone, VDI numbers etc. You may pick up subtle differences that might help you decide weather to dig pulltab signals, you will still dig pulltabs but your odds of a nice gold ring may skyrocket.