Landroid S109 Knife disc

This is a derivative fitting my Landroid Worx S109 machine which has a bit different dimensions than the original.
Besides the derivative, I have added a step file for the original design to enable others to adapt the design to other landroid models.

The big difference from the original thing here is that the knifes is ~12mm close to the grass - which is more similar to the original mower disc.

The great advantage over the original disc is that you have more mass (flywheel effect), more blades and slightly bigger diameter to get close to the edge.