OK I had a late start as we had people over for lunch (they were delicious thanks) and just finished cleaning up a few minutes ago.
Everything went really well, the mash was a little too hot, I heated 28 litres of water to 70c, added the grains, gave everything a good stir and put the lid on and wrapped it all in a blanket. I checked the temp and it was around 67 after 30 minutes, then down to 65 after an hour, then at 64 when I started the burner for the 90 min boil. The whole mash was supposed to be at 64 so I don't know what effect that will have! So then I pulled the bag out and gave it a bit of a squeeze and put it in a bucket. Figured there was about 25-26 litres left in the kettle so I rinsed the grains in the bucket with enough 78 degree water to bring it up to about 29 litres.
I managed to add the hops at the correct times and had no boil-overs. Added the immersion chiller at the 20 min mark and it chilled down to about 21 in about 20 minutes which I was happy with, and strained the wort into the fermenter thru a colander lined with swiss voile (mesh is a little too fine for this, slow going)
I ended up with 21 litres at 1058 and diluted it to ~23 litres at about 1054. Pitched the yeast (US05) and put water that had been boiled and cooled into the air-lock.
I am happy with the sugar level although it might contain more unfermentables because of the hotter mash. I will update this thread to let you know how the ferment goes.
I enjoyed the process, although I will definitely start earlier next time!