Thanks for the thoughts, folks.
I'm pretty sure the wood that was on the press originally, which was damaged, rotted, and falling apart, was beech. The mills local to me (except one) only carry local hardwoods - beech t'ain't one of them. The other mill only carries European beech, which is WAY out of my bottom feeder price range.
Yes, walnut is softer than QSWO. And sugar/hard maple (
not soft maple). Is it too soft for this service? I doubt it. That's my opinion, based on working a lot of walnut. YMMV. I'm not interested an a stainless basket, but I'm also not planning on doing 20 presses a season. Yet. Again, YMMV.
The acrylic rounds are a good idea. That said, my press plates are cast, but perforated similarly:
I'm as yet undecided as to which wood I'll end up using. Walnut is my favorite wood to work, all time. Ash is second. Fuming oak appeals to my love of woodworking and of chemistry. Maple is probably the most pragmatically appropriate wood for this (lacking beech locally); it's dull as Oprah to look at. But I may still end up with it. Like I've said - I look at this as a combination of a suitable wood, and something that I'll be happy with, and right or wrong, it's not solely a functional decision for me.
Process is a large part of the enjoyment for me. I'm enjoying every aspect of this project, including these design decisions along the way. I appreciate everyone's input about all of this - I learn a lot, and it spurs me to do more investigation. Thanks folks.