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Put me in the camp that believes bonding is not needed for safety. I suspect that somewhere there must be a standard for safety glass/implosion protection put out by the government? When bonded tubes were new the marketing was about style & sealing out dirt, not protection. I wonder if optics played a part, as well. The cheaper roundies with unbonded contour glass were clear while the more deluxe, bonded tubes were generally frosted. When mounting a frosted faceplate you'll notice how spacing them out too far quickly hurts clarity. I believe the PVA would help this.
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Bryan
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