Welcome back Charman, glad to hear all is well.
I like the sound of the Eco Barn conversion. Of course, now you've lowered your carbon footprint you do realise you'll need to get your G46 project on the road to balance the level of 'greenhouse' gasses going into the atmosphere.
After all, I've heard that messing with the atmosphere is a bad idea, so a reduction in your carbon emissions could lead to catastrophic Global Cooling and trigger another Ice Age...