Easy question for all you pool experts! I was having a pool contractor change out a vinyl liner on my pool that was built in 1968. New variable speed pump bought last year, New paver deck in 06. All was in good shape. Liner leaked at light but contractor drained water further down past shallow end to leave only 2-3 ft in deep end. Claimed it was necessary to remeasure before ordering liner. Left it drained for 2-3 weeks. Wood walls in shallow end are leaking sand and dirt and bowing in at the plywood wall seams. His response is see ya later alligator! " It was gonna happen no matter what he did and its not the amount of time without water that caused the problem". Funny how the walls weren't compromised even when I had water only halfway up on the wall on the shallow end ! I get that it has to be drained for installation but to leave empty like that for weeks? His response is that if it wasn't rotted plywood, which it wasn't, it should have held that long and longer! What's your views? Thanx for letting me pick your brain.