Marko, you might also consider making some development tubes from a plumbing supply store's materials. They are just black plastic drain pipe with a cap on one end and a removable plug in the other. You would have to work in a blacked out bathroom or something similar at night to handle film, but these tubes give very even development, are cheap to make and are easy to use.
Get some 40mm or 50mm inside diameter drain line and cut it into 150mm lengths. Then glue a cap on one end and find a screw in type of plug fitting for the other end, this lets you work in a lighted room once the film is loaded. A water bath is used to keep temperatures constant and the tubes just float and spin in the water.