Thanks. I just found those threads, probably the ones you mean, showing the plastic wrap method.woodsplitter67 has one (or more) very informative thread on solar kilns, how to build, what to to expect for moisture content. Search and you'll find it.
I'm hoping to plant long hedges of hybrid willow, hybrid poplar, and locust here, to eventually produce enough fuel to keep the buildings heated. Willow and poplar dry very quickly, and if they are cut very young in a sustainable coppice regrowth system, mostly at around 6 inch diameter, they can be dried with the bark on and will need very little splitting. The problems are that willow and poplar produce about half as much heat as slower growing hardwoods like oak, and that poplar makes a lot of sparks (it pops) when it burns. However the locust wood burns longer, so I can mix some in with the willow and poplar for longer burn times or more heat.
I've been experimenting with hybrid willow for years. It's probably all I would need but adding poplar and locust for some biodiversity.