1a. Print one of this file:
* Nelson_Marshmallow_Sofa_Mounts_Plate.stl

1b. Print two of these files:
* Nelson_Marshmallow_Sofa_Marshmallows_Plate.stl
* Nelson_Marshmallow_Sofa_Frame.stl

2. Once printed, the mounting holes in the marshmallows should be tight and allow for a friction fit, but it may it may be necessary to slightly enlarge them. Use a pin vise with the correct drill bit to do so. CA/super glue will likely be required to affix them to the mounts.

3. The full-size sofa comes in many finishes, e.g., silver frame with black marshmallows, black frame with red marshmallows, etc. If you don't have the correct color filament, print with natural/white filament and use spray paint or permanent marker to color the finished print prior to assembly.

4. Test fit parts and use CA glue to affix them. Suggested assembly order:
i. Glue marshmallows onto mounts. Pay attention to orientation and distance of marshmallows from mount.
ii. Position completed mounted marshmallows onto frames. Ensure that marshmallow mounts are not too far nor too close to each other (small pieces of tape are helpful to hold mounts in place while viewing from different angles).
iii. Once positioned, use CA glue to attach long mounts to frame.
iv. Finally, position and glue short mounts to frame.

Take your time, work slowly, and reposition/re-glue as needed. It took several positioning and gluing attempts to assemble the pictured sofa correctly.