I'd agree that there are to many 90's in your set up. Just cause you have pretty good cooling as it is, doesn't mean you couldn't get better.
And those 6 restrictive fittings have got to have more than halved your flow rate. Just changing to some long sweep 90's or pairs of 45's would help a good deal compared to the elbow 90's now in use.
Could real easy gain you a C or 2.
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