A3 Spool Box V1 Wide

I increased the width of the [original spool box](https://www.thingiverse.com/thing:4899516 "Adventurer 3 Filament Spool Box Version.1") by 1 cm to make sure it fits 8cm wide spools with an inner diameter of 5cm. They would have probably just barely fit in the original design V1, too, but I wanted to be sure. I also used V1, as this allows for larger spools to begin with, and I did not want a door mechanism for the cover anyway.

The images show this wider version, and the fit of a "standard" spool as well as a wider one.

Note: This spool holder part will only fit the newer Adventurer 3 models with four reinforcements on the built-in spool holder! (see [here](https://www.thingiverse.com/thing:4746044))

Modifications

- The box parts are extended by 1cm

- Increased the length of the part that holds the spool by 13mm to fit larger spools, and to still latch onto the side cover when attached (the side cover has a round insert, and the spool holder is designed to rest on this