Martin, I felt very lucky to find someone that was producing what looks to be a very high grade of quality work and at such reasonable prices---the Fostex brochure shows some damping and sand bags installed----trying to figure out how to make those items now---I have another guy sending me some more horn plans for Fostex driver that were designed by the Janpanese ---personally I find the horn design concept truely awe inspiring---something that is in every way equal to the vaccum tube itself! What a pair! can't wait to get started ---- Jim