Here is the finished mold, everything gets cast twice
except the seat pad to the right.
And here is the first mock-up, not complete, still needs the swing arms in place so that the back is elevated and the seat back can be "reversed", have to play with the castings a bit to make that work right (bit of a design flaw, but easily remedied). Next steps, figure out the fix for the seat backs, cast up a bunch of parts, and put them all together. With any luck, few casts per day, should have a complete set of seats for New Years. A MAJOR step forward !