Consider the paper at [URL or DOI] and its linked data and code. Reproduce all numbers reported in it, with one script (R or Python) that runs from a clean start. Put your numbers next to the published ones, and for each published number say where you took it from.

Then identify the 3–5 analysis choices that are most fragile, list them, and predict what changing each might do to the results. Do not run those alternatives yet.