first mark the size with a scalpel, next put the blade with the straight edge to the outside and deepen the borders. That way you create a kind off barrier when you scrape/cut away the inside.
Cockpit fitted and openings in the wings filled with putty. droptanks are dryfit. These consist of 3 parts, and the tailpart has some serious sinkmarks...
Reworked the refueling probe... could be done better. Had to heat the brass, it couldn't be bent in such sharp corner without breaking... The material get's softer, hence I loose my rigidity... the wifey will be pleased ... 😉