Thanks a lot thats some great info, very difficult to find anything on these clamps, waterlogged on xs likes them a lot though. Definately use clmaps especially for first time, have read about tubing popping off barbs. Your bitspower barbs look just like these danger den fat boys i'm thinking of using with the clamps. Will also be using 7/16id 5/8od over 1/2 barbs 
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