You can overcome the unscrewing sprocket problem by using a bolt-on sprocket type of hub.
Another problem is that the pedals will tend to unscrew themselves when cranks are swapped over.
@yoav started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
You can overcome the unscrewing sprocket problem by using a bolt-on sprocket type of hub.
Another problem is that the pedals will tend to unscrew themselves when cranks are swapped over.