It may be preferential that electrical conductors and other elements passing through a portion of a hollow interior of the tubular body have a combined cross sectional area that is less than 40% of the cross sectional area of the hollow interior of {HEAD ~ the tubular body} to reduce {TAIL ~ flow impedance} 
to reduce
It may be preferential that electrical conductors and other elements passing through a portion of a hollow interior of the tubular body have a combined cross sectional area that is less than 40 % of the cross sectional area of the hollow interior of { HEAD ~ the tubular body } to reduce { TAIL ~ flow impedance }
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