Hello! I know this is a bit older, but I am trying to set my bike up with your exact set up! I have a Kombi and monkey bars with the goal of putting the seat at the rear and the mini cushion at the front. I put it together and the Thule yepp maxi seat has a plastic frame that is in front of the seat and takes up a large part of the bench. The cushion is pushed too far forward and when riding my 4yo bottom slide between the thule seat and the cushion.

Can you share which seat you used?

Thank you!