Thanks for the comments guys. The first one is a static one but jib can be lifted up and lattice jib swung into postion, stabilisers can be moved in and out. Managed to get a parts manual for this one but produced my own scale drawings. Second model is an modified Italeri kit. Third one will have motorized winches and be able to rotate. Got a couple of manufacturers drawings for this one and a load of photo's of the real one. Done about 15 layout drawings of this on CAD. Looking at building a small CNC machine to produce parts for it. DickyD those trucks look familiar, have you shown them at Gaydon model truck festival ?