Hi Jurgen, I am anxiously awaiting your end result, or combined with the one Kladovec has, with all the motors etc. I have successfully built your 8043 Ultimate, with the controller, took me a while to go through all the pictures, but the end result is worth the effort. That, and the Truck 8x4 with Detachable Lowloader by Designer Han, which I collected from all corners of Europe eventually. I am really considering this 42009 crane, but I want to wait for the kinks that will be discovered over time, and resolved.