From the discussion I had with Paul it is just bringing it into line with the EFRA / IFMAR rules and it was pointed out to me that they run in much hotter countries than the UK.
My reason for asking was about gaps in the rear of the shell when switching from mid to rear motor (which of course Scorpion can). I just wanted to know if I would need 2 shells or not.
I have no real opinion on the rule, I am sure it is there for good reasons.
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