Interesting Kay, we mix and pour
concrete by hand all the time (granted, now we rent a mixer, but we used to do it by hand). Or
should I say, my workers do.
I have a software background. I can't tell you how often you need to rip something out and rebuild it. One of the things I loved about software was that there was no material costs... just time. And, in the early days (and now), my time doesn't cost anything.
The truth is, I have more failures than successes. But, hardly ever are they noticed because they are small experiments. Rarely do my experiments work the first time - but I learn
enough from them to succeed on the next try, or the one after that.
I will admit to have been for a long time scratching my head about
PDC. I just couldn't figure out how a design would work the first time, after just taking a
class. I could see it after having a lot of experience, but just after a class.... The thing as well is that a
permaculture system needs to grow up, most of the successes I have read about took years to achieve. I think the danger that
permaculture faces is people think that it is like doing a garden. No, you are evolving into something permanent, and that is going to take time.
By the way, I was at one time a chief software architect and after that, a director of hardware and software in some very technical stuff. I have never seen a design for anything large that wasn't adjusted, sometimes repeatedly. Why do you think software has versions? It isn't only for new features.
But, sometimes I do something by accident, and it works out incredibly. Like Acacia Mangium as a pioneer species. I was given 200 seedlings by a nursery (I had bought 14,000 that year) and so I just planted them in the worst place imaginable. Well, they thrived, and whatever else I planted next to them thrived as well. Now we are into harvest and it is very good
wood too. Though there are better trees for flat areas, for acidic soils and steep slopes for the tropics, I have never seen anything like them.
But a failure was Cuban mahogany, and I ended up replacing all of them that were planted (over 5,000).