The only way I can see to thwart this is maybe if grossly over tightening the UC/pad suspension. But then I might be in danger of breaking them. They (mine) are pretty thin, and it doesn't take much weight to stretch them.
But all of the above is fine theory if some one is interested in how the SS works. It doesn't answer the question of why so much condensation/sweating in the SS or BB with VB. And a few folks have had seemingly unsolvable problems of this sort with the SS. And as you said, things may have been even wetter WITHOUT the VB. so......
Have you considered that you may be one of those folks who are simply going to have to use a BREATHABLE UQ of some sort? One clue might be that you "used to get very sweaty using a thermarest on the ground". I never had that problem. So maybe unless your back is actually cool you are going to sweat? A question to consider: is this actually more of a sweat issue than a condensation against the VB issue? ( just guessing wild) So maybe it is a matter of temp regulation, both top and bottom?I also used to get very sweaty using a thermarest on the ground, so maybe the problem is me, not the hammocks! Most mornings I've been able to air out my bedding, but if I was doing a multi-day walk, or it was wet and miserable it wouldn't be possible to get stuff dry.
As far as temps go, mostly around 5-10C. It's happened in both high and low humdity which makes me think maybe I'm overheating as Youngblood's post says. Trouble is, I'm not awake to know it and do something about it.
2Q, thanks, yes I'd read Youngblood's post previously (I was one of the ones who needed it!) and I'm still not sure I fully comprehend the whole thing.
I'll acquire a CCF pad and try that to see if it helps, or try not using a VB until it gets down to freezing. Colour me confused (and moss green)!
Thanks all for your answers.
Or maybe you will do better with something breathable under your back, like one of the JRB, Speer or WB quilts. The only caveat there: if it is indeed a sweat problem, and not a condensation problem, then if your back is nice and warm and then you sweat into your down UQ, that won't work out well at all. So you somehow have to figure out which it is. I'd say if your are likely to sweat anyway, you might as well sweat onto your VB, which will at least keep the moisture out of your down UQ.
Again may I ask, are you staying warm at 5*C with the HH Open Cell Foam pad in the pad pocket of a WBBB? And in fact even soaking it? Because I just don't see how that very compressible- and not all that thick to start with- HH pad can work in the BB. I have enough weight on a CCF pad in a BB that I can not move it. That should be enough to flatten the OCF and make it useless. If I am not missing something, maybe this is an indication that you are an extremely warm sleeper, and thus will sweat easily?
Keep us posted on how the CCF works. I'm projecting a wet experience.