Ben, I think what he might have been getting at with the balance pipe, is using a y fitting to divert some of the flow round the block, maintaing good flow through the loop despite the restriction of the small barbs. However, due to the components with the small barbs being the rad and res, I don't think this would work.
It is possible that the guy who starck copied that from meant this and it has been misinterpreted by all parties.
Who knows.
I also agree that a reducer down to 10mm barbs will offer less resistance than10mm tubing all round.
8-ball
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