All good mate, meets FIA minimums. My only suggestion (speaking from experience) is to use a carbon fibre seat because in a rear impact, a fibreglass seat WILL break where it transitions from horizontal sides at the base to rib-cage wrap-around for the seat back (I broke 3 ribs in just such an incident back in the noughties which was a right PITA).
I went with a carbon seat and ali-plate back stay behind the seat-back with 1" hi-density foam cushioning.
I am talking a full-on ProdSports car but of you want maximum protection, that is it
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