This is a tutorial for making your HelloBeePrusa 3D-Printer more stable on the Y-Axis.
Here you can See the wobble problem with the Stock Printer.

https://www.youtube.com/watch?v=Qv7a9iDf7pQ

Hardware:
1x "Y-Achse Verstärkung" (2 printed parts)
2x 350mm M10 Threaded rod
1x 328mm M10 Threaded rod
4x M10 self-locking Nuts
10x M10 Hexagonal Nut
14x M10 washers

Assemble all like you see on the Pictures.
Now your Printer is more Stable.

Print and enjoy....