Guys I know how to set mesh....this isn't my first time. There is a design flaw with the open hole for motor placement in the chassis. If the track has large jumps or flat landings the lack of material in the center of the chassis allows for to much flex causing the spur to break. If your track doesn't have a great deal of large jumps I would guess some would not have issues. Our track does have larger jumps and three of us are having issues. the others have went to the M2C chassis to correct the issue. Tekno has stated on here multiple times they are aware of the issue and are working to correct it. I just hope they plan on making it right with those of us who have had issues.