Moisture % question
I purchased some Ambrosia maple blanks with a moisture reading of 16-20% (according to the seller). I've read 7% is ideal for turning, and 30% is considered wet, so what is 16-20%?? Do I treat them as if they're wet and turn them, set them aside for 6 months, then true them up and finish them? I'm going to need them to be almost perfectly balanced (which is hard enough for Ambrosia maple). For my purposes, I can't afford any warping, so I'm pretty sure I know the answer here, but I really want to get this pretty stuff on the lathe, stat! I know I'm going to have to get myself a moisture meter, but at what point can I consider wood to be stable?? With a moisture reading of 20%, how long will it take to dry out a piece with no more than 1.5" of thickness?