Thanks for the coments. @jsprogg Yup, I could not resist entering. I hope that I wont disapoint you. Good luck to you. @mtmckinley Thanks pal The catapult itself is a mechanical, but he is loading and prepareing to shot by steam power. I've tryed to explain the proces in my previus post. Today I have worked on the third building witch is some sort of command center, and armoury for the catapult. What do you think of it? I have also could not resist to make some preview animation, and here is it. https://www.youtube.com/watch?v=WT3uql-0Hgc Udateeee!!! https://www.imagehosting.com/out.php/...9_Update01.jpg https://www.imagehosting.com/out.php/...0_Update02.jpg