hey allen, no problem. im glad we can share experiences. funny you are planning on building a double top tube bike, i own a couple of them and my original plan was actually to copy one for my first bamboo frame. i later abandonded this idea and built the two bikes you have seen (the first one stopped creacking after a couple hundred k's by the way, and has not made anoise since, the cargo cruiser does not creack at all!).
anyway, i look forward to seeing pics of your completed bike, and heres a pic of my favourite double top tube fixie: