You won't ever miss having a choke once you get the FCR's on. Like others have said, 2 twists of the throttle and some turning of the idle adjuster, depending on the temp outside and the Duc will fire right up. Installing them yourself should take between 2-4 hours, depending on what pace you go at. It was actually a fun job, just don't get the relays crossed up when you plug the electronics back in. Don't ask me how I know this...
Regards,
Jeff