HEY GUYS Let me bounce a thought off of you. I was messing with the Schwinn/70cc Gru Bee and took it for a ride after putting the pushbutton lock clutch handle from DAK on. I love it. No more suprise locks when stopping at corners and a nice smooth release when ready. I hooked up a light and got to wondering if there was room between the sprocket and spokes for a caliper when the thought came to me. THE THOUGHT>>>>>How about replacing the plastic idler on the chain with a #41 sprocket with a drum brake mounted outboard of it. A strong bracket could be clamped to both top and bottom fork tubes. If there were any question of the chain climbing the idler, stick a bit more chain in and a 2nd idler to curl the chain around several teeth, similiar to the rear deraileur on a bike. I have some cute little drum brakes from E scooters that might do OK since the braking effort would be good with a small diameter idler, or there is always the go-kart calipers. If you have any interest or thoughts, let's hear them.