Hi, I would like some advice. I work on Long Island with freeze/thraw cycles. The customer has a concrete walkway that is 30 years old and in excellent shape. It's 80' L x 4' W. The customer would like to keep spare the expense of removing this walkway. Would I be better off using plastic edging and laying the pavers on 1" sand and using sandlock? My other option is to use Porrtland and mortaring the soldier course and then laying the pavers in sand and use sandlock? Also, I'm gluing bullnose pavers on galvanized metal coping for a pool. The coping moves when you step on it. Can I tamp base under and around the coping or do I need to pour concrete around the coping? I also want to butt the coping pavers together with no mortar joints to minimize the chance of cracking. Any opinions?