Yes, extra arking stand to add. Wingtip to wingtip you need a space of about 2 cm: the airplanes wingtips/winglets are relatively close to each other at parking stands, about 10/12 meters that are 2 to 4 cm in the different scales.
Then the wood panel: already grey so you could not have the necessity to paint it, but just realize the tarmac grid and then the parking lines and marks.