High mount filament monitor for HICTOP

When changing the extruder of HICTOP 3D printer 3DP-17 to Bowden type, it created to change the installation position of the filament monitor.

~~*filament_monitor* --- Standard type~~

~~*filament_monitor_for_PTFE* --- insertable PTFE tube into upper hole~~

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**2018/1/31**

- Chamfering angle of lower hole was changed to facilitate insertion of filament
- ~~add arm stand parts *(arm.stl)* for guide and support filament~~

**2018/2/13**

*filament_monitor_V2* --- reinforced ve