The "Bessy" comics were also published in "Felix", a German comic magazine by Bastei Verlag. From 1965 on, they wanted to publish a complete new story every month, a rhythm they increased to twice a month in 1966. Unable to produce so fast, Vandersteen had to expand his Studio considerably. Led by Karel Verschuere, a team of some ten young artists mass-produced the comics, which were of considerable lower quality. The most important of these artists were Frank Sels and Edgar Gastmans, while many stories were produced by Daniël Janssens. When in late 1967 Verschuere quit, and at the same time Bastei increased the rhythm again, now to one complete comic a week, the Studio was disbanded and Sels and Gastmans started to work on a freelance basis. The next year, they decided to go behind Vandersteen's back and to sell directly to the Germans. Vandersteen then had to reorganize the Bessy Studio and hired Jeff Broeckx. The Studio continued until 1985, with artists like Patrick van Lierde, Ronald Van Riet, Eugeen Goossens, and Walter Laureyssens. It produced more than 900 "Bessy"-comics.