Boy this takes me back... I used a film Unidrum and reels for a lot of years back in the'80s when I did all the B/W processing for the arch. photo firm I worked for. Always the dribble from the lid end. I just made sure the drum and roller were synchronized to let the drip fall off at the end of one of the rotation cycles and into the tray the motor base sat in. A small sponge caught the drip.

Boy, it's amazing how the brain works when sitting watching and listening to the mesmerizing action of the drum rolling first one way, then the other for uncounted minutes... But the sponge worked and years later I went the JOBO route. (and back to school and a couple of different jobs, etc., etc.)

I bet I still have the drum and reels tucked away in a box...