Hey @Smallform Gaming, do you know if there's a flat adapter like the 92mm to 120mm one you used on the Noctua heatsink for 80mm to 120mm? I may try to do your mod with this heatsink instead of the Noctua since it supposedly performs a fair amount better. (~15C lower according to one person's testing!)
There is... but I'd run tests on it first if you can because there is a lot of excess plastic. The 92mm works well for focusing the fan. This 80mm may work but this may also be too much. Maybe run some numbers then some of the plastic could be shaved off if it isn't a good result?