After having built my models the A4 holds about 30 slips of mind and mouse.  They ought te be corrected in the *.dwg but meanwhile I found out this idea is error 31...The proof is to be seen in the pdf screendumps below. The one on the right is PaperKosmonaut's repair of mine =  the left one.

What actually went wrong may be clearly visible in the following two built models.

Three major mistakes.

1 - the inverted tailwheel doors

2 - the too low canopy

3 - inclined nacelles, leaning forward due to insufficient space for the wing (no bent should be visible under the 3)

The shape of the front element of the cowling was correct, apart from an essential tiny gap...