Thank you very much,
The included tetenal manual says nothing about different development times for Fuji and Kodak films that I could find (though +/-2 min for push/pull processing). However I posted the same question at the forum and got the figure of 16% increased development time for Fuji film.

Ok, 42mm chemicals per roll that'll be 10.5 per sheet, hence I should be able to do 3 runs with 75ml chemicals and two sheets 4x5" each and still have some margin.