I agree with all post above. Check fitting three times, stick once, this is a golden rule for a such kits.
But back to the image of the Bf 109G-4 you posted above. I wouldn't follow that because it is a shot of a kite restored in our times. Nowadays paints are of better quality and not always correct with its tinge when applied. What is more it is ex Hispano Aviación HA-1112-M1L 'Buchón', Werk-Nr. 139, C.4K-75 A few sources mentioned it was the Avia HA-1112-M1L. The aircraft completed restoration in 2004 which brought the aircraft to Bf 109G-4 standard, complete with a DB 605 power plant and registered D-FWME. As memo serves a such kind of markings , I mean the red number 7 and the Gruppe bar , wasn't used with the late varinats of Bf 109.
If you have a nice ink or laser printer you can print all decal markings you need. But you have to decide which varinat of the Bf 109 you want to have. Painting is the last thing you have to think about.
And the Polish pilot landing by parachute, near the British farm workers :
Pilot - "Good aft- er -noon".
Farm worker - "Good afternoon my ar*e !"
Later seen scanning an English phrase book, looking for the aforementioned phrase!!