G'day Pedro (@holzhamer),
I built this kit, well the same one Louis (@lgardner) has, back in 2016 and it is one of my favourite builds.
Looking at my build notes I can offer the following advice;
• I glued the two lower fuselage parts together and when dry, I glued three spacers spanwise across the gap at the top so that it had the correct spread for mating to the upper fuselage part. This also gave some internal strength to the join which was needed for when I later filed and sanded the join smooth.
• The upper central wing and outer panels are butt joins so I reinforced this area by gluing some plastic sheet under both upper central wing surfaces (see picture).
• The Do-217 had slotted ailerons, meaning that there was a gap between the wing and the aileron leading edge. The kit doesn't have this feature, perhaps betraying the vacuform origins of the kit design. I considered doing something about this but in the end I decided to ignore it as I wasn't sure exactly how big the gap should be, nor the correct profile for the ailerons.
• One of the criticisms of this kit is the front cowling ring and the cooling fan and one can purchase after-market resin replacements for these. I couldn't see what the problem is and used the kit parts. Another criticism is the spinners, again part of the after-market replacement set. After looking at numerous photos, I decided that the spinners were a shade too long and the propeller openings far too large. To remedy this, I sanded the rear of the kit spinners to reduce their length, which also had the effect of reducing the propeller openings to give a closer fit.
• A bit of blending with putty and sanding was required when it came to attaching the nacelles to the wing, but I didn't think this was too bad.
• poor fit of lower nose glazing and blending upper nose glazing
Good luck with the rest of your build.
2 attached images. Click to enlarge.