This is a small minimalist heat insert press designed for CNC Kitchen TS100 heat insert set. I didn't want to use a counterweight so I made an invisible spring and belt system hidden in the vertical part. Its size makes it perfect for small job on the workbench :

The sides are super convinient to store everything you need (there is also a spot for a small alen key).

I have added the step files if you want to design your own soldering iron mount or use a different base.

Miscellaneous:

• 20 * M3 brass insert
• 22* M3x8
• 1 * M3x6 screw
• 2 * M3 Nut
• 3 * M3x25 screw
• 7 * M5 nut
• 6 * M5x10 or M5x12 screw
• 1 * M5x16 thumb screw
• 2 * GT2 idle pulley ID Ø3mm
• 1 * GT2 belt (200mm should be enough)
• 1 * Spring or elastic band
• 1 * LML12B 200mm linear rail
• 1 * CNC kitchen Heat Insert Set
• Optional :
  • 1 * M4x8 Screw
  • 1 * M4 nut

Assembling:

• Insert M3 brass insert (see red arrow below)
• Use M3x8 screw everywhere except 1 * M3x25 (see orange arrow below)
• Use 1 * M3x6 screw to lock the spring or elastic band
• Use 2 M3x25 to mount the GT2 idle pulley
• Insert M5 Nut (see yellow arrow below)
• Make sure to run the belt before assembling the GT2 idle pulley
• Use a small piece of adhesive tape to secure the belt on the arm mount (makes it so much easier to mount the belt on the sliding carriage)

Print settings:

• PETG for the soldering iron holder, other part can be printed in PLA
• Layer height : 0.2 mm
• No support
• Print orientation as shown below :