This kit helps you to solidify your Prusa i3. It has 3 advantages :
• It allows you to have a more stable Z-endstop adjustment,
• You printing quality will be better if your Z-axis doesn't move anymore
• You can now speed up your printer without any side effect.
You may need some material for this modification :
16x additionnal nuts
16x additionnal rings
2x 46cm (minimal lenght) threaded rods to link the Z and Y axis
2x 46cm (minimal lenght) threaded rods in order to replace those on the Y axis.
You may also need longer screws for the top parts.
Printed fine in PLA with 200µm precision.
You don't need any support.