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Finish off retaining wall & drainage

Hiya, builder husband has started the retaining wall but has had to go away for work for a couple of weeks. Is anyone free Sun 17, Mon 18, Tue 19 Sept to finish off the retaining wall (all timber, screws provided etc) and grab some drainage rock to put behind it? It should only take 3-4 hours. It's just putting on the horizontals (though some will need cutting on an angle).