Hi Si, nice work as ever.
As this thread is about the pictures, If you are taking Macro shots then it is mainly a matter of practice and in my own humble opinion a decent camera. I'm afraid phone cameras and little 'pocket' cameras just don't get the results (This is my own personal opinion and I fully support the rights of other people to disagree and have a opposite stance if they so choose.) One of the joys of digital cameras is you can just delete it if you don't like the result!!
I don't know what camera you are using but I use a tripod and a shutter trigger, at the risk of teaching you to sucks eggs, the trigger is a cable with a button on one end, that screws in to the top of the shutter release on the camera and reduces the 'shake' when taking the picture as you don't have direct contact with the camera itself.
Have tried putting something like a piece of white card in the background? I see you are using natural daylight, the card will help bounce the light around and with practice will help bring that stunning water effect through (any chance of a tutorial on how you achieved it?), as well as highlighting the rust effects and detailing on the model.
There is a good chance you will see shadows you don't want at first. however, again with practice and playing around with positioning of the model and camera etc you will get some first class pictures to enhance your first class builds.
Hope that is of some help...