This is my design of a container crane. It is available in the downloads section. I am figuring it is close to 1/400 if printed on LTR not A4. The container in the picture came from the Sealand Express model found here, http://ecardmodels.com/product_info.php?cPath=60_74_89&products_id=982 In the plans you have the option for the raised boom or the lowed boom. If any one has any questions feel free to PM me and I will gladly answer them and help.