LG Roboking Replacement Brush (L and R)

This is my first attempt at a useful 3D item!

We recently bought an LG Roboking robotic vacuum - which is awesome BTW - but the right brush broke off. The design is such that the left and right are slightly different. As luck would have it, I only have a left replacement spare. While waiting for LG support to send me a new one under warranty, I knocked one up just to see if I could do it. A few goes later and a little fishing wire and viola! Not exactly the same but it seems to do the job.

Happy to take comments on the design.

Note 1: It does need to be scaled to fit - not sure what I have done wrong with the file. The diameter of the main circle should be 24mm (excluding the protruding brush parts).

Note 2: I updated the file recently with a simpler design that is a little closer to the original. The first attempt was too thick and fell off when the Roboking started its daily chore!