Just discovered this CDS paper from 2020:
https://climate.copernicus.eu/sites/default/files/2021-05/C3S_DC3S311a_Lot1.3.4.2_2020_BestPracticeGuidelines_Part2.pdf
Which actually hints there's a part 1 too, anyway I didn't;t have time to read it past a quick look tab the index but it's something we should look at as a source of tips. And possibly linked it as a resource somewhere.