If you're looking for a tolerant/forgiving medium speed film, try Efke R 100 (KB 100 for 135-film, and PL 100 for sheet film). It's an old fashioned film, made after the Adox R21 formula from 1949. I've heard that it's also sold as Fortepan 200 and Bergger 200. Many people say it works very well in PMK.(posted 8114 days ago)I have never tried Verichrome since I never found it here in Sweden. I didn't even know it existed before I got internet. :-/