What is the general feeling about flushing a new loop? I am just about to build a CPU/GPU loop in my Enthoo Pro (covered in another thread) and was wondering if it was worth flushing prior to installation. All bits - bar the GPU block - are brand new. I do remember some stories of people flushing out bits of flux and metal in brand new loops - is it worth running a bit of de-ionised / distilled water through it first (could tie it in with the leak test I guess)?