I learned my lesson for sure on Ronnies Detector he sent me to try out. It was in the salt water 1 min. and bit the dust. It was on the final test though on that Black sand beach. Will post later how the F75 did on that beach. It worked great in all metal. Could not hunt in Dis. and will post reasons later. I have to wait till tomorrow to hunt though. Really tied up the rest of the day. I really liked the F75 that is why I ordered one from Ronnie. 
: : Later Jerry aka Tinfoil
: : Later Jerry aka Tinfoil