Hi,
....I beg your pardon for my very bad english ...
The Tamiya's kit is an Dewoitine 520 "late"(serial number>351). This version had Chauviere propeller and spinner(in the kit the spinner is too long for Chauviere, and too short for Ratier.)
The engine cowling have 3 airscoop on each side.
One of original plan
and the drawing (Qcad)
The early version "tête de série"(n°1 to 39, except 25) had, two airscoop+1 adjustable shutter on each side, and Ratier propeller but not the airduct compressor
The D520 Série (serial number 25, 39 to 350) two airscoop+1 adjustable shutter on each side, and Ratier propeller and the airduct compressor
In the first time i molded the nose of Tamiya to obtain a base in resin F23.
I cut several checking jig from my drawing, and I sand or I coat with putty.
Below, for exemple the work D520 1/32
cut all section in plasticard, the Azur kit isn't good,