Tier extension and top cover
thingiverse
The plug fits tight so it can stay in place. May need to use mallet to put in.
Download Model from thingiverse
With this file you will be able to print Tier extension and top cover with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Tier extension and top cover.