So I have been tinkering with the idea of combining a pad in a double layer with a TeWa Summer Breeze ( had this alone down to 37 deg.) to drop my kit down to lower 20's. I haven't spent the night using a pad yet and I'm not to sure about the temp I'm going to safe to drop to but I would like to figure this out to add a option for those Oh Crap it's getting colder than forecasted nights.

Anyone have a good experience with this set up?