Realizing that the Mast Box (Multi-Tasking) post was less than clear in describing what I am doing, I figured I'd try to illustrate the concept. The cleats are not part of the mast box design but are there to support the mast box on the saw horses.
Here is the mast box set up on the table saw (picture saw horses):
And here is a further development: the plywood will span the saw horses (and be fastened securely):
As soon as I can move a couple of saw horses into the barn, I'll set up the mast and proceed with re-rigging Karen Ann's boom and yard. …and consider Mast Box Mk-2.