I developed some days ago my first 4 sheet of 8x10" PL 25, exposed at 12. 6'30" in ABC 2:1:1:15 (standard dilution will be too strong) are a bit too long for my N-1 negatives. The film is less yellow sensitive than current panchro films, a yellow filter might be standard for outdoor use. Be very careful with the emulsion, it's very sensitive, I've got two films slightly scratched, it almost never happens with other films.
If I remember, Aaron Van de Sande tried Weston's formula.