you're going to have to apply better techniques in sketchup if yo uwant better results down the road. your circles can not have 24 segments as i see there. thats is too much. go plugin shopping online for free sketchup plugins that allow you to enter in the amount of segment for your shapes like cylinders, pipes, etc... each can have their segment values adjusted so there not as smooth, but acceptable. you're still going to find that the next program will break your faces into traingles thus increasing face count. but you can really minimze this by paying close attention to details in sketchup before you export. I am redoing the c40-8 so that it can be used in high count tiles. I was able to reduce the model by 40K just by maniulating faces and chosing pipes and cylinders with 8 segments instead of 24. better start now or your headaches are going to begin.