Okay, finally got the Stirlings up on their new, custom Sound Anchors. They arrived a few weeks ago, but the packing was more complicated than I expected (bolted to sheets of 3/4 plywood). I just haven't had any time to do anything with them till now.
They're a perfect fit. Heavy as all heck, though. The estimate before they were built said 45 lbs., each. I call shennanigans. These things are much heavier than the speakers themselves.
Anyway, I've still got some dialing in to do, but they have perfectly accomplished what I wanted from them: I no longer feel like I'm looking over the balcony DOWN into the soundstage. It's up at eye/ear level, and it's wonderful.
I'll post pics when I can. Right now, the listening area is a bit of a wreck, as I'm moving a lot of stuff around in the process of replacing my equipment rack, etc.