OK, seriously, you need to get a decent TS. I really like the way you are experimenting with Sketchup. I think your skills would slingshot ahead with the ideas you are coming up with. That last design is really unique.
Now take another look at it again and consider the possible forces that the outer pieces will be having to resist. I am absolutely not saying that the strength is not adequate so much as to get you to consider that possibility. Just something to watch out for when thinking outside of the box. Keep it up.