I have an ash blank from a tree taken down by a line crew before COVID. They said it had signs of ash borer damage. I've had it stacked and air drying since I slabbed it.
Started inletting late last summer and found it brittle. Struggled with the lock inlet to the point of messing it up. Set it aside and haven't gone back to it yet. Maybe it dried too long, or maybe it's just me. Only my third lock inlet. But, I had the barrel channel done elsewhere, and that came out perfect.
It can't be "dried too long". Once it is dry, it is dry, and more drying time will not hurt anything.