Thanks for the fast reply! I have removed the rivets and this seemed to work. An entire side of the rivets was doubled up too no wonder google did not like it! Thanks for your advice. Next time I will start it with a bit more structure to my building work and think on when I ca reuse a component.
Thanks again 
Hi Im new here, My name is jay and I have a question.
A little about me. 28 from the UK at college learning AutoCAD 2D/3D, I have used Sketchup for a long time but not really learnt all its features fully. its more of a way for me to relax and create without having to be so exact like CAD.
I have made a model and uploaded it to 3D Warehouse, I know its a complex model and I have tried to reduce it as much as I can. I have made a few models some for Google Earth and some just to kill some time and this is this first complex one I have made, So I was wondering if somone could take a look at it and identify where I could improve/reduce the size of the file for Google Earth.
Many thanks Jay