Minecraft LED Sword

there are some minecraft swords on thingiverse... but i did not find any with LED ;-)

this is my first selfmade 3D object - please let me know how i can make things better :-)

I split this sword into 4 parts because my printer can only print 20x20x20 and i need different colors for the blade and for the handle.

for the code i simply used the button cycler demo:
https://github.com/adafruit/Adafruit_NeoPixel/blob/master/examples/buttoncycler/buttoncycler.ino

for the electronical parts i used:

- mini Slide switch - main body: 10x5x5 mm complete: 19x15x6
- Tact Button Schalter 6x6x4,3mm 6 * 6 * 4,3mm 4 Pin Micro PCB SMD SMT Momentan Tactile Tact Push Button Schalter 4 Pin DIP
- WeMos D1 Mini Battery-Shield
- WeMos D1 Mini - but any other arduino should work
- Accu: 3.7V 800mAh LiPo Akku 25C 1S
- M3 screws (5 or 6mm long)
- threaded insert M3
- standard WS2812B LED strip (for me 17 LEDs fits best)