Mateusz,
Almost a month has gone by since I first saw your post, sorry about the long delay in posting. I have come back to see your build many times already just to have a look. That is quite a project. I think it is one of the best small scale Leopold's that I have ever seen. The size of this machine must be impressive. It would have been nice to have seen you place at least one figure next to it just to give us an idea of how really big that monster really is!
You did a really outstanding job with the one color scheme and weathering. The one thing that I did not like is the base. I have seen some of your other dio's and I think that you could have created a better base for the rails and wood blocks. It almost looks true to life with the exception of the base. Then again I don't know if the rails (tracks) come as separate items in the kit?
Thanks for posting your work,
-Eddy