If it were me, I'd have left out the carapils. Your extracts already have carapils in them, possibly some other low-L carmel/crystal malt as well. Extract beers don't tend to lack body or head retention, primarily because of how the extracts are formulated. They're designed to make a decent beer all by themselves.
Stop using so much caramel malt. Your beer will thank you.
(yes, Carapils is a caramel malt...so is Special B)
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