I found the files for the Butter Spreader Device by Alferez_Alberto to be a great design but a little incomplete. The Main Screw was hollow, and came apart like a slinky. The Extruder retaining ring broke off right away. The compactor seemed too weak at the joint where the cylinder and compactor head were joined. So I remixed them, making the screw solid and reinforcing all the joints. Now, this thing works great!! Try it yourself, you won't butter waffles, toast or anything else the old fashioned way, again!