I am at the point in my 818S build where I am cutting out all of the openings in the fiberglass. I may be stupid, but I cannot find any instructions in the manual for cutting out the intercooler duct openings in the engine cover. I also cannot find any mesh or trim to put around these. Are these supposed to be just rough cut and ignored? Also, I would like to feed more air to the turbo intercooler. I am seeking some kind of scoop or enlargement for the inlet openings. I am thinking maybe something like boat vents or something. Any ideas?