Disc Shooter2 Integration

I have designed and printed some modifications to try to improve MAUnique's fantastic design:

- Added a stop for the disc loaded in the lower tray with two very thin tabs that do not seem to diminish the launch;
- Slightly shortened the spring that sometimes hits the next disc in the magazine;
- I made the spring a little thicker and stretched the cuts on it for more elasticity;
- Extended the hammer on the spring for more power because the disc ended a little forward;
- I changed the magazine by building an oblique sky with a slot to insert the discs that I have often lost.

The pieces I publish serve to integrate the original design that you find https://www.thingiverse.com/thing:4645960