The temperature tower test I found ages ago here didn’t actually change the toolhead temperature of the Flux after being converted to fcode. I’ve built and attached a fixed version of this filament test so you can get an accurate measure of what temperature a given filament works best at.
I now use this test for every new roll of filament I buy. With it, I’ve found that the same color and type from the same manufacturer sometimes has varying ideal temperatures.
If you’d like to use it, download the GCODE file on Thingiverse. Don’t use the STL. Their site required I upload an STL in order to publish.