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Well, the 4 and one-half inch thickness comes from the benchwork supporting the upper layer. A 2x4 will be used for the main member and diagonal bracing of 1x4 will also be used. So combining these I get 3.50 in. + 0.75 in. = 4.25 in. with a quarter inch gap to the existing drywall. Now it is certainly possible that I could do something that would reduce this thickness above the upper layer, but I cant reduce it behind the lower layer. I don't want to put the backdrop right against the wall because this is a finished room and I don't want to do anything that would compromise that. I don't think that would survive Right-of-Way negotiations, if you get my meaning. Thanks - Ed
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