It's not me bumping the thread, just look at the times and dates.
Only because they're responding to you, and you're obsessively watching and replaying to this thread.
Edit: Also, about the CAD suite. Just check out "lego creator", "lego racer", "Lego racer 2" and "Lego designer". Lego has actually implemented a feature similar to TC's idea. Only simpler.
The 'only simpler' part is important.
Besides, blender is a free program. And so is yenka for the logics.
This isn't how software development works. You don't just get to mash a couple of other programs together. Yenka (which I've never even heard of) doesn't even seem to be open-source.