2 Jezzer: you are right. Maybe I should try second run with that orange pen.
2 1'M Blue: no problems between diffusor and tips. Groundpanel fits also very nice.
When we are speaking about CF parts - I am still undecided about side skirts. Revozport original installation document suggest to use some kind of plastic trim which is inserted between body of car and flaps. I am little afraid of that solution. It does not look good even on manufacturer ilustration photo