Paper Trimmer

I made a Paper Trimmer ,When use it, A ruler is needed as an aid.installation instruction is shown in the picture.special tips:I need a wallpaper blade, and break off two parts with plier (see picture. ) after inserting blade.( Be careful your hand)This model was printed using PLA. (fill in 10%，using a lower layer hight (0.15/0.2mm)，no support)