thanks joe, I got the porter fabric wednesday. However, it's 60" wide.
So you used 12' circum for a 100" circum 30+30+20+20, and I believe coffer used a 90" circ. for a 34" wide box. That's what confuses me. I guess I can't mess up using more....
Thanks also about the tip of bottom versus top, hadn't thought of that one.

How high did you end up putting the 'table'? around waist height?
thanks