Ah. Glad to hear that there are lugs available to accommodate a sloping top tube. I want to build this for comfort rather than aerodynamics so that's a good way to get the handlebars up a little higher.

I'll try rattlecad tomorrow when I'm at my home computer.

Do you think if I went with an OS road tubeset that I would have to bend the chainstays myself if i wanted to fit 29x2.2 tires?