This may be obvious to folks who read the code, but just as a heads up: the script from 24 Oct 2019 doesn’t scale a lot of attributes in the font info, such as vertical metrics like the typo/hhea ascender, etc.
For some reason that isn’t clear, it also didn’t scale the width of composed glyphs like /eacute, on an earlier run. However, after installing RF 4.5, it did seem to scale all glyph widths.
Overally, just be careful and observant if you run this. It works well for fonts in the early stages of design, but you should be cautious on fonts that are closer to release.