That looks wicked! black as treacle! I love dark beers, especially Stouts, and that post mash pic looks like a really rich espresso

Any other reason why you attach the syphon tube to your mashtun for sparging?, other than to avoid the wort going everywhere? I guess what I'm getting at, is although we want to aerate the wort post-boil - is there any issues with it getting aerated pre-boil?
I've started collecting a couple of litres of the first runnings, sticking it in a large pan, heating on the stove up to around 80C and adding it to the top of the grain bed - it's a bit fiddly, but I've had some very cloudy worts of late...
Anyway, your stout looks fantastic! would love to try a bottle sometime!