Review on 🧹 KOVEKO Neato Botvac D Series D3 D4 D5 D6 D7 D75 D80 D85 Robot Vacuum Cleaner Replacement Parts Kit, Includes 2 Main Brushes, 2 Hepa Filters, and 6 Side Brushes by Sharon Smith

I have hard rough floors. This level of damage cannot happen to a carpet. Replacing the main brush completely destroyed my Neato D7. It's about 1/8 inch shorter. As a result, he laid the drive hex gear on the ground until it rounded, which in turn lowered the front of the unit. Since he works unattended, he then drove over the frame and sanded the entire bottom of the vacuum cleaner. There were flat spots on the small wheels behind the main brush caused by the weight of the unit. The first picture shows the small guide wheel behind the main brush. Flat spotted and worn through. The second image shows the Original brush on the left and the Revain brush on the right. It's definitely too short. Photos 3 and 4 show flat areas lapped on the bottom of the vacuum cleaner. The last picture shows the grounded brush drive.