I agree that the old Leitz table-top tripod was a delight, even though I've never had one. For 8x10, however, the best tripod is one that is heavy enough to require two porters to carry it in a sling suspended from a longish pole. That approach has the added advantage of creating notches in the
porters' shoulders, not yours.
As an alternative, you might try the Barker Bipod, shown here with the optional mountain stabalizers. Unfortunately, it's not well-suited for LF work.