hi , i'm payam you reply in my post regarding 1/2 baja scale ! i want to know if i make the 1/2 scale what kind of engine i shoud use! and see i want to make something big but same as baja 1/5 but in 1/2 scale , and i want to know Who can sketch this parts for me?! or if i give it to someone to make it to 1/2 scale i have to tell them to make it 2.5 size bigger than normal size? it'll become 1/2 ?