Extra long straight shafts and extra large search coils are not the answer to dealing with sanded in conditions.
You have to keep a tight search pattern to cover the beach correctly, especially when searching during slow treasure hunting times.
Try not to over extend your search coil sweeps, only extend your sweep a couple of feet past your shoulders.
Never use a metal detector like you are trying to cover the whole beach.
You trade depth and sensitivity to small jewelry when you try to cover extra real estate with the long shaft, extra large search coil or a combination of both.
People sweeping large search coils have to sweep faster to keep the heavier search coil moving, leading to sloppy metal detecting techniques and missed targets.
This Tiffany & Co Platinum and diamond ring was found on a heavily hunted south Florida tourist beach last year.
I was searching in the dry sand, just to the side of another dry sander ahead of me who was lifting his search coil at the end of each sweep.
The platinum ring was found in line where the other guy was raising his search coil.
Many beach and shallow water hunters mistakenly believe that you have to cover as much of the beach as possible to be successful.
I would rather search less ground correctly than more ground incorrectly, tighten up your search patterns and leave the beach happy knowing that if gold was there you would have found it.
In my opinion, it is not the amount of beach you cover, it is how you cover the beach!