Supra needed more red filtration as it aged. I aslo found less filtration and faster paper when I moved from Supra, some thing less that 60 in Y and M.
I aim to adjust aperture to stay between 5 and 10 seconds. I understand that longer exposures can lead to reciprocity failure at different rates for differnet colors. I have not vigorously tested this, just stuck with guidelines in literature I read 20 or more years ago.