This is my Parkzone MkIX Spitfire converted to a Mk1a, you would have to be rivet counting Spitfire Geek to spot the mods so I'll list the obvious ones:
1: The fin/rudder was re-shaped to look like a spitfire. (the Pz mk9 is totally wrong)
2: 14mm cut from the nose to reduce the length of the motor section.
3: Air intake is a different shape also this is a working air intake to cool the ESC.
4: Left radiator removed, new oil cooler to replace said radiator.
5: New exhausts 6 into 3, these are working exhaust and allow heat from the motor to escape.
6: Radio mast modded to correct shape and also to carry a radio wire to the fin.
7: Cannons and breach bulges removed and .303 machine gun ports fitted.
8: Tail wheel 100% scale tail wheel. this is removable to convert back if needed.
I hope you like it