How do I make a crescent? I want to make a perfectly round crescent but no matter how I tweak it ends up looking lumpy when I use a curve extrusion. As I subdivide segments and try to eyeball each point's radius scale... it just looks bad. 

I am stumped how does one make a perfectly circular crescent?
Like this?


I used a bezier curve, The less points you put the smoother it is.