I'd be tempted to agree with you if I hadn't compared the 7030+ with my
HF-150 this morning. The HF-150 was significantly less prone to
overload than the 7030+, and I can't believe it would be if the latter
were performing up to specs. I suspect the SD5400 mixer is damaged,
since that's known to produce this sort of problem. I'm also sort of
hoping it's a damaged SD5400 mixer, since that's a relatively easy
thing to fix.

Steve