if you try it again. Use shims between the hub and the sprocket. When I first got mine I watched a video for assembly instructions... lots of videos. One of them, the dude used cut zip ties as shims between the hub and sprocket to keep it centered...
I've gotta say my biggest mistake on my bike has got to be that I am running the original rear wheel and coaster brake with no other brake. I know that I should be changing that, but until I can afford good parts to do it, it'll have to do. Also I have only pushed it to it's max speed once on a back road, and I am generally only running around at 15 to 20 mph.
Forgetting what happened with the LandRider and not replacing the rear stock axle in the Sidewinder with a cro-molly axle. Had to replace several spokes as a result.
The picture is what happens to stock axles in freewheel hubs.
New jug, thought it was cleaned up. No, a bit was in the crankcase. I was chasing turkeys across a rutted field, it died. Found the bit in the cylinder wall.
One g-clip screwed TWO jugs.