...the next thing I´d like to do is work in the "rain pan" of the deck lid grille but I don´t know wheter I cut , mount a plexi cover, mesh or something like that below the grille.
I don´t know if it could affect in the airflow aircooled (hot issues).
I´ve seen some cars without it like Emorys Outlaw and others with a custom plexi with holes like Singer.
Any advice, opinions?
If you only drive on sunny weather you could do away with it entirely and it will improve your airflow; otherwise my advice is to leave it alone.