Thanks guys,
The whole drain and re-fit loop too me ages. I started at 7.30pm and finished at just gone 3am!! Mind you, I had to clean everything....got the vacuum cleaner on the rad core...pretty dusty, cleaned all of the fans, clean out res and rad...etc...
I've re-filled the loop with black fluid-XP...I was a little unsure about the look of black coolant but having seen pics of Mr Smith's rig that swung it for me.
Matt - yup, the black elbow makes such a difference, I have also added the spacers on the copper side of the GTX blocks. It seems that this coupled with shorter pipe runs, less restrictive elbow has increased flow rate...the coolant was flying into the res at a rate of knots when I was filling it up!
Agreed re the EPS 12v cable....I tried to route it under the GTXs, but it wasn't long enough.
I think the rig is pretty much complete now unless anyone has any suggestions??
OC details to follow..
Thanks again