SMD soldering clamp

Simple structure that help soldering SMD components.

The general idea taken from https://www.thingiverse.com/thing:2772207
The design has been simplified, enforced, and adapted for 8x20mm spring(typical spring used in extruders).

Extra parts:
- Spring 8x20mm
- 15mm M3 or M4 screw/nut
- 20mm long metal rod (e.g. part of bike spoke or m2 screw without cap)

Assembly tips:
The simplest way to connect metal end is to heat it up with soldering iron and stick it into the plastic.
Use m3 screw for arm/base connection for lesser tension.