This is quick weekend project - simple tool for installing inserts by soldering iron.

Sizes doesn't matters. Do what you want :]

Parts needed:

• old LM8UU bearings (4pcs.)
• old 8mm linear shafts or pipes (2pcs.)
• 20mm profile (1pcs.)
• a few M4 screws/nuts and 3mm wood screws
• 10mm springs (2pcs)
• wooden board (plywood or whatever you have)

Notice: Part iron_bracket,stl is suitable for my chinese soldering iron (30-32mm dia.). If it doesn't fit to yours feel free and design a new one.