Phew! I had some Kerb Flo 500 at £11.10. Had a shock when you posted £8.70 as never normally far out.
I used to avoid pendimethalin with our last sprayer (white plastic tank, ind hopper and wheel centres). Chafer steel tank/induction and grey wheels means I'm not fussed at all now.
I think aqu has some claimed formulation advantages as well as being nicer to use ? - Red Bateman with stainless tank isnt too big a problem with alternative cheap PDM apart from the white wheels !