>>1935174>Guessing consistency around the first time is just something you learn with practice?Pretty much.
>And, is handling consistency on long curves just a matter of persistence and fiddling, or is there some technique that can be taught/told?Both. Fiddling I can't help you with but got the part I can tell you:
Use as few nodes as possible, keep the handles parallel and mostly the same length in the middle of lines that have an S turn and longer on the outside of a large U curve, like the top of her head.
Half ass example attached, You want the handles a bit more parallel than that but I only had 5min before I had to work.