"If you have any doubts about composite and lightning I would recommend reading the AAIB report into the glider which was struck a year or 2 ago. Remember the Top Gear test when Hamster Hammond was put in a golf and electrocuted? Metal shields the occupants from a perm (or worse)."
I know about the accident, I am an ex gilder pilot and have built a composite PFA aircraft. WHY do you think metal is better than Carbon?
Rod1