Hi Ken.
Yes I am using one of the old Waders with the blue shaft.
Combined with a Vibra probe 580 this is the perfect combination for use in the water.
If you look at Cornwall on Google you will see that in some areas it is only about 15 miles wide in places and we live half way across the county so I am within an hour of about 300 beaches.
With the Wader being so robust banging it against rocks for up 5 hours a day, no other detector would stand up to the does no damage, I reinforced the bottom of the shaft with one inch plumbing pipe so I can use it as a walking stick when I slip on the rocks.
I have been looking at a PI but I may as well just wait for the storms to remove the sand or wash the goodies onto the rocks, we get 100mph storms all the time.
As Cornwall was trading with the Minoans up to 4,000 years ago there are reputed to be up to 6,000 ship wrecks around the coast so I keep looking for the mother load and not the trash the Emmets (tourists) leave behind.
Have a good detecting season.