That's pretty much what I was recommended by the excellent customer service at Aquacomputer as well. Thanks a lot for the input!

Thanks for the help! Could I perhaps make it easy for myself and just attach something like this: http://shop.aquacomputer.de/product_info…roducts_id=2697 (airplex modularity system 140 mm)? If adding another pump/radiator to the system, how important is it to match the flow rate of my old and my new pump? Will they wear each other down if one "keeps on pushing" he other one?