Surely an appropriate thickness and grade of Hardox would remove the possibility of pass-throughs. A thin quality double-sided tape such as 3M 5925 VHB should allow for sufficient acceleration transfer. I don't see SM components being troubled by the impacts, but batteries and their housing/contacts, and the antenna SMA maybe.
Just off the top of my head I would have thought that the RF side would be the most problematic in terms of intermittency, what with the TX radiating from behind the plate and without the option of maintaining line-of-sight between the antennas. Would you mind providing a link to the RX / TX pair you are currently using please so I can give it further thought ?
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