Filament Lock

*Note: I've used this Filament Lock and my [Filament Retainer](https://www.thingiverse.com/thing:3627765) for more than a year. I have found the Filament Retainer design to be better suited to my requirements. I have recently updated the [Filament Retainer](https://www.thingiverse.com/thing:3627765) by adding a nose to prevent catching on spoked filament spools.*

1.75 mm Filament Lock

This is an improved filament lock to prevent unspooling and tangles.
This better meets my original requirements over my [first design](https://www.thingiverse.com/thing:3627765).

###What I need in a filament clip:
- No clipping to the spool rim ✔
- A flag that identifies the loose filament end ✔
- Prevention of loose filament tucking under another filament loop ✔
- No need to remove the clip when using the spool ✔
- Work with any spool ✔
- Easy to print, no assembly ✔
- Easy to use ✔

The first design works but I found that on some spools the retainer could slide and allow the filament