No idea about the mill, but I'll look into it. Thanks.
8/9 oz fresco is about as good as it gets in 90 degree heat w/ humidity imo/e. But a lighter weight might not be a bad idea. Or maybe linen or hemp blended with wool. Luxire has a lightweight wool with 30% polyester that has gotten good reviews. It's machine washable, iirc, which would be very helpful for hot, humid wear. Maybe that's an option too.
A RAF blue in lighter weight would be good for the suit-wearers among us. Since I usually just wear a sport coat, I've decided there's only four shades I need or even want: light gray, medium gray, oatmeal/stone, and tan/khaki. Oatmeal/cream fresco is perfect w/ various blue, brown, or green sport coats.