Hi CR, I also have spent a lot of time investigating diggers for detecting.
It's so tough in the ground at Summertime eh!

Then I use a mechanics lever I suppose you'd call it, it looks like a huge screw driver with the blade bent a little at the end, about 18 inches long...
For harder dry season ground first I pinpoint best I can with the coil, then whip out the Garrett Pro pin pointer to locate the target.
My buddy and I like the 2 inch range on the Garrett Pro, it limits us to only digging shallow coins in sensitive parks, we just probe out the coins at these parks,
we like to look back after our hunt, and not see where we've been.
If we are detecting in a cared for turf I will always try not to plug, I like to physically probe with my home made probe, it is a stainless steel tip from a car antenna which has been firmly embedded in a golf ball.
In the bush where I can get into the digging with gusto, I love my Lesche "Little Eagle" shovel, it's fantastic !!!
I must post some pics of my diggers eh!It's all steel, top grade alloy beautifully welded;
___ built really tough ... I also have a standard Lesche digger,
same fantastic quality!Early on I made 18 inch long pointed levers with which I would just work down under a coin, and with the leverage just lift the ground, take out the coin, and stomp the ground back flat.
Sort of like the image below...

Catch ya later....
