What I think is happening here is your layer is being laid down correctly , but the pull from the cooling layers above that supported layer is causing it to pull up and away from the support . A few thoughts You might be better off standing the part on end I don ' t think you need internal supports on this , I would try bedonly You are correct that brim is bed only , it is to help a piece stay attached to the bed , they dont really work together in a cooperative manner as they have different goals . The new version of Cura , 2 . 3 . x can print a skin on top of support however . I would probably try a grid support or turning your part 45 degrees on the bed if you want to print it laying down like this . Check in your support settings , your ' Distance Z '. If it is larger than your layer setting , consider decreasing it .