thats a good point churchy, this is plan B, plan A, had the 560 doing intake and the 140/280 doing exhaust,
but the theory of putting hot air through the rads made me re-think.

the fans are VERY low flow, the top 2 120s are exhaust only and there will still be a few BIG gaps, at the bottom where the 140 mounts there is a hole next to it, and at the top above and left of the 280 there is mesh and a gap. as can be seen in the pic of the back, i will probably fill in the square hole between the rads, but leave the other gaps open.

the side panel of the case is a full window, i could put fans in the other panel.

i like the theory about not putting extra pressure on the fans, i will think about this
cheers mate

alexandros, do you mean the RGB LEDs? LEGO FTW!