Very nice Stuka Nikola. Your photography skills aren't to shabby either. Don't sweat it.
I can offer a few pointers if you'd like. If you're looking to improve the realism a bit more there are a few simple tricks you can employ that will go a long way to help convince the eye. One easy step is to sand down the edges of open panels or intakes, vents, exhaust stacks, etc. Get them paper thin or as close as you reasonably can. Many of these objects are no thicker than 1/8in so at 1:48 scale you can imagine it's actually pretty d@mn thin. For an open panel like a gun bay it's more likely that there will be some kind of flange or border that the panels screw into. It's an easy thing to sand down a wing opening thin from underneath and build up the border based on photos of the aircraft. Makes a huge difference.
When displaying engines it can help to add some hoses and cables that fit around the engine. Use original photos of the aircraft and not refurbished aircraft pics.
I'm not too familiar with weathering patterns for German aircraft, but you've done a nice job with weathering yours. I can see the steps you took to arrive at this. It looks like you have a good eye for getting it done. =]
Hope that's of some use. Again, you've got a great looking Stuka. Hats off to you.