I am not sure I posted this in the right place but here it goes. I need to build a sound restricting enclosure for my Tormach mill. Does anyone know how good plexi glass is for this, thicker, thinner, double pain? The size of the enclosure would be 48" x 76" x 48" high with front access and all sides would be able to slide verticaly up and out for special access. This would also need a top. Any recomendations?