That sounds like a really fun idea you've got there and a lot of work, so hopefully your vision of your project comes to life the way you desire it to. Demos normally are good to help show off a good aspect of what you're working on, but I definitely get wanting to wait till it's done. Just make sure in all this working to take of you as well. Your creations are great and worth waiting for. If there's anything I can do to help, I'd be happy to. Can't wait to see your new creations and hope they come out how you want them to.