I have been using this reamer for a very long time. Good tool for sheet materials. But the handle is not very comfortable when you have to rotate with pressure. Today I have finally decided to fix the shortcomings.
 

See the video for details:

If you liked this thing - let me know by putting like!
 

Parts links below:

• Reamer tool 0-14mm
• Thrust Bearing F4-9M 4x9x4mm
• AB Glue Epoxy
• Hexagon Socket Button Head Screw M3*16
• Flat Washers M3
• TopZeal Filament ABS

Links to used tools:

• Mini Metal Lathe
• Machine Screw Tap Set
• NOGA deburring tool and Blades