Hand drafting Curves through multiple points
I have a small problem with hand drafting curves. I use the attached plastic curve thing but its not very effective, after a while I cant get any good curves any more and its difficult to get a nice smooth curve that passes through 3 or more points. So my question is What drafting tools do I need to be able to sketch smooth curves that pass through multiple points over three points? How do you guys do when drafting by hand?
It's been a while, I used to use a compass and French curves, I used to have one of those flexible things but found it useless as well, it was a good back scratcher though :)