I need advice from anybody who has installed and used the Weber Beam Blockers. The speakers in my 2x12 cab are rear-mounted. The speaker rims are pressed firmly against the baffle they are mounted to. If I install the beam blockers in the prescribed way, I believe I will need to place them between the speaker rim and the baffle. That means after installation the speaker rim would no longer be pressed against the baffle and there will be a gap all the way around except where the rim comes in contact with the beam blocker. Even if I were to place washers or shims of some sort at the remaining mounting points the speaker would still be separated from the board --- there would no longer be a complete seal between speaker rim and baffle. I would think these gaps might be detrimental to the integrity of the speaker rim or might adversely affect the tone of the speaker (blocked beam not withstanding). What is your experience?