Starting to make a small airport for the test, he is not ready but i look nice!
About the tarmac grid? 1 cm x 1 cm in 1:500 scale, 2 cm x 2 cm in 1:400 scale (1 x 2 cm in 1:400 scale if you want to realize rectangles).Which dimensions of the concrete tiles do you recommend? There are many different sizes.