The actually container slides onto the mounting bracket and hides the command strips pull tag so you don't have to see any seems or drill any holes. If you decide you want to move/remove it just slide off the container and pull the release tab. Print in PLA at 0.2mm 20% infill and no supports needed This prints open end down (see photos / screen shots) and should not need any supports. There is a small notch in inside of the bottom so that one layer makes 2 small bridges and then the next layer bridges between them (please see screen shots). I print at 0.2 for speed. 20% infill should be fine.