Sandbox Test Over
Well, I'm finished my sandbox test, and as near as I can tell my theory is correct - the sandbox can be avoided for if planned for properly.
It's been brought to my attention that this is commercially valuable information (I don't normally think in terms of hording information), so I'm afraid I won't be sharing all my data, but I am practicing what I preach on my own website.
If you are technically skilled, you'll be able to figure out what I did and why it worked from the previous 2 posts and by looking at my site.
Ian