This conversation has been merged. Please reference the main conversation: Reversing spin of trimmer
This is a feature that Husqvarna integrated into their cordless string trimmers, so I know it can be done. There are a bunch of people who have used gas-powered trimmers and I didn't notice this until recently because I'm not one who has used gas, but the EGO trimmer spins the opposite direction that trimmers like Stihl's FS-90-R and various Echo trimmers. It would be very good for some people to be able to make the trimmer spin the other way if needed. That would be something I'd do just to keep debris from going somewhere I don't want it to go.