I have plenty of paver experience but this is my first installing pool coping. I am installing Belgard Pavers around a vinyl liner pool with steel walls along with a bullnose pool coping paver. The top of the pool steel wall has a pvc track that connects to the liner. This track causes the front edge to be higher than the back edge. (photo included) I will be pouring a 3 ft concrete base out from the pool dropped to allow for a sand base. I know to use the expansion joint between the row of coping and the pavers. I need some experienced advice for how to attach the coping and how to obtain level. I have seen posting stating use mortor, adhesive, thinset. I don't want these popping off later. Thanks.