Thank you very much for your recommendations!
FuselageAs mentioned the fuselage is closed already.
On both sides some PE parts have to be added.

The halfes had a recess below, so there is no need to sand the glue seam line

Into this recess a stripe with stitching have to glue in.

White primed, sanded and futured for the decals.

After the recommendation with decals, even if is more work. At first the underside, followed by sides ...

... and then on top.

The tailplane should not be forgotten.

The stitching needs a lot of softener.

The tailplane is mounted and give the decals one night drying time.

Today I painted with heavily thinned Tamiya XF-8 and a bit clearcoat.
The lower lozenge creates some strange mixing colors, but it will not be very visible.

I like the result. At first glance dark blue, but then the cross and the lozenge looks through.
Less paint compared to my first try.

It needs some drying prior painting the nose yellow.
Cheers,
Frank