Works like a charm, thank you very much for saving me hours of terrible work! I just made one small mini-tweak, because it merged all first two rows togehter, I think this happens because after the first merge, numbering of the cells is shifted.

my edit of the second merge:

…
tables.cells[0].merge(tables.cells[1]);
tables.cells[1].merge(tables.cells[3]);
…

(or maybe using them in your way, just in oposite order would also help)

Thanks a lot!