Unreal Dave
I was just going to post exactly that myself .
I was asking myself if it was a placebo trick but it can’t be if you got the same , my pump normally pulls 2.5 amp today I have knocked it back to 1.5 amp
My water is way hotter as its flowing slower !
I got red and grey fans but much prefer the red
Next is the medium as the stiff feels stiffer than usual if that makes sense
Well done Alex , an absolute belter of a brush, and the bumpers are very well thought out