Ronald Young said:Q1:I am planning to make a Architects desk early next year.
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Q2: See Fine Woodworking Issue 144, " Thomas Jefferson Writing Desk": it has a similar support rack for the writing surface.
First thing I thought of when I saw the photos in this thread was Jefferson's writing desk, although I'm not sure how important this is. It may well be that any adjustable top would have to have a similar structure.
Will the desk you plan to build be used for real work or just display? If real work, I think I'd rather have one with the drawer/legs coming out of the side rather than the front.
Pam