As far as the decals are concerned, they are not Techmod. It says printed in the Czech Republic, Techmod usually put their name on anything they do. I think the Royal boxing will have Cartograf decals. I think that is what Eduard normally do with Royal boxings. I will know in a few days time when it arrives.
The codes are a bit on the pale side for Sky and the red of the chess boards a bit anaemic. The red and blue of the national markings are dark in colour but a little brighter than usual, the red has a mottled look.
Hopefully you are able to see that.
There are six options to choose from and I have issues with two of them.
MH712 “Pat” did not have any stripes under the wings.
In late 1944 this was perfectly normal.
I am not impressed with Pat, her chin seems to be joined to her breasts. A few whiskers and she could be Desperate Dan in drag. I have a set of decals from Kagero's Topcolors 15 that have a much better looking Pat. However she is riding on a champagne bottle. Only recently has it bee discovered that it is in fact a 500lb bomb. I might try cutting out Kagero's Pat and placing her on Eduard's bomb. Small niggles that really do not matter. I think the admonition “WYCIERAĆ OBUWIE (WIPE YOUR FEET)” , also seen on other Spitfires of the Polish Wing, was white and probably only on the side that the pilot entered the cockpit. I cannot make out the MH part of MH712 at the top of the fin. Sometimes aircraft were identified only by the numeric part of the serial number so there is nothing significant in this.
As for size. The upper wing roundels were 56 inches in diameter, the red centre 22.4 inches in diameter. That translates into 1/48 scale as 2.96 cm and 1.185 cm respectively. Measuring the decals I find Eduard to be 2.95/1.25 cm and in comparison Techmod 2.9/1.2 cm, Eagle Strike 2.9/1.2 cm & Lifelike 2.9/1.1 cm. So if anything, Eduard are slightly larger, not smaller. A similar exercise with the fuselage and underwing roundels produced similar results with Eduard, Techmod and Eagle Strike spot on but Lifelike 1mm too small.
So far the only kit decals I have used have been the stencils for the door and the propeller spinner.
I was given some advise by a Polish modeller some years ago. I cannot say for sure that it makes a difference but I have used Techmod decals a lot and I do not seem to have had the problems that others report.
Do not soak them in water. Instead wet the back of the paper with a brush. From my own experience. Wait until the decal is free to move at the slightest touch. Do not try to encourage it to move. When moving them make sure there is plenty of water under them. Use a sharp needle to pull them from the front into position. Do not push them from behind or middle, especially stencils, as they can buckle and break.