fishing hard spots

We have lots of hard bottom down here at SPI, but hardly anyone knows the spots but the pros on the head boats. It also takes a high quality powerful fishfinder and the knowledge of what to look for. You must know where is it in advance because you must be moving very slow. You are looking for a 'thin-line' clay bottom as opposed to a 'thick-line' soft sand bottom. I've got numerous hard bottom numbers for SPI, but I'm not giving them up. Sorry. There is hard bottom areas on the East Bank. The first time we found it, we were just drifting and searching for snapper bites. It took a while but we did find some. The East Bank begins 15 miles due east of the SPI jetty. Good luck.