Spa leak down at the check valves was resolved. The spa leak through the wall from what is under the spa overflow is not resolved. How difficult is it to removed the spa overflow sandstone ledge and re-install with no gaps in where ledge meets spa edge. what is the best type of mortar or substance to use to lay the sandstone. Is this something a novice bricklayer/stone guy can perform or too many unknown skill required? Thanks to the group.