Agfa's recommendations are generally for contrast of 0.65 which is a bit high. The pdf uploaded by Lee is unusual in that for 1+100 it gives the resulting contrast at 15min and at 20min, and for PanF+ it's the same for 15min and 20min. Also it's interesting that it recommends 250mL of solution at 1+100 which is only 2.5mL of Rodinal. Agfa also stated elsewhere that 5mL was needed. I wonder if they did the 1+100 test with 250mL and that small quantity actually was exhausted at around 15min, which would mean perhaps that if you used 500mL then you'd end up with more contrast.