Hi There.
I would just like to give a bit of feedback if I may.
I feel that the point by point drawing approach is quite laboured and the end result always takes Alot of tweaking to get a decent curve. I also feel, even after tweaking that you have to pushdown way to hard to make a Bezier point appear.
Would it not be possible in the future to just draw the curve, and set the maximum number of Bezier points before hand to save on calculation time maybe?