Does anyone see an issue with putting the vermiculite/concrete mix that is recommended for the walls and floor of IG vinyl liner pools over concrete??? I finish leveling a squaring the panels, and of course I guess I over dig in some areas (up to 4” in some areas)…. The walls are not too much on an issue but the shallow end and slope towards the shallow end is…….. I was thinking of maybe pouring some concrete in a few areas (to bring it up to the 2” that the instructions call for) when they pour the collar for the panels, and THEN putting the 2” of Vermiculite/concrete on top of it………any thoughts????