27 Feb '11: I made the piping weather-shield a couple of weeks ago, and made a padded insulation lining for it a week ago. It fitted nearly perfectly first time, with only a small amount being filed off the left hand side for it to fit cleanly into place. It's designed to reduce long term wear and tear on the exposed pipes, but I hope that the thermal insulation wrapping around the pipes will have a tiny benefit in reducing system losses.
It has always been a benefit that the Sunboxes are strong enough to lean a ladder against. And I inherited the ladder from my Dad - and am so glad that when he bought it, he included this demountable safety feature of a safety frame at the top.