Thanks, I know fine well that people mainly just look at the pictures and will read the text if it interests them further, I'm guilty too. Pictures and 100 words and all that!
I totally understand what you say about the separate cooling; a small PC should just be that and I've seen some incredible builds where they achieve that. This PC was all contained at first, mainly to test the components but also to see if it was actually worth the effort of external cooling. The system worked but by god it was hot and noisy! Now with most of the heat being redirected to the radiator which sits on a window sill (to extract the heat out the room rather than bring in cool air), the PC case itself is so quiet. It's still cheating though

!