We created a wiki to help you evaluate (1) the quality of your summary statistics after data removal and (2) the suitability of these downsampled summary statistics for typical follow-up genetic analyses (e.g. prediction with polygenic scores).
In the wiki, you'll find the steps, data, and code.
As a use case, we evaluate the quality and suitability of the externalizing summary statsitics (Karlsson Linnér et al., 2021) without 23andMe data.