Went for a test drive earlier this week, she definitely behaves a little differently in the corners. In a good way, just a matter of getting used to it. Feels like the back end doesn't want to kick out as much.
I also noticed vibration was cut down quite a bit. And when I drive over an unavoidable imperfection across the road, the steering wheel doesn't want to hiccup one way or the other, stays straight.
When I had her on the road last, the amp up and died on me. Took it to a local repair guy, some insulation and capacitors had failed due to age. All repaired and back in the car now.