I don't own a dual rec, but at least I own a single. I think the hot plate is good, but not that good that I can't live without it. I don't know, maybe it's the 6L6 tubes that doesn't break up as el34 does.
One thing I noticed: When using the hot plate with 12db and 16 db settings and cranking the amp to its nearest fullest, there is an audible kind of "flanger" effect to the powertube distortion. Why is that? Bad bias?
Currently I use mine at 8db, combining some powertube breakup with preamp distortion. My clean channel really sparkles and can maintain perfectly clear. That strikes me a bit weird.
Is it the global output or the channel master you use to crank, or even both?