Actually, by joining your idea about D3O® Recoil Pad very much, thickness might be the issue as additional, outer protection like TPU, is needed. Following your path on shock absorption protection layer (for the edges) I was thinking to use somehow (with calculated inserts/stripes on four edges under the molded TPU shell, kind of embedded into) something that is not thicker as 1 mm (and lightweight). And such material comes from NOENE® (100% viscoelastic Swiss made material).
I’m not having time to do this kind of handwork but might help if some investment needed in such private project by ordering offered option (within molded shell, preferably without back side or with purposely perforated one) in advance (or investing in needed material cost) . Additionally it is much better if someone can order/buy this material in bigger sheets as B2B, without having clue on where to make such order to get up to the potential needs calculated Noene® 1 mm sheets, Italy maybe. I hope that someone find out some workaround for this if Purism self not considering to offer something adequate (vibrations absorbing).
Test of this technology efficiency is in French … easy 1,2,3:
P.S. Balsa is very, very light and natural material, but without other necessary properties (including huge thickness issue that would be needed for stability) to be useful (and cut down for such purpose).
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