Dave,
Your project reflects your excellent fab skills and logical thinking. In an effort to make a complete ass of myself and exhibit my kindergarten graphic skills, I've tried to expand it to the next (and probably ridiculous) level.
I'm sure that for the mere cost of your firstborn's eye teeth, K&N would custom make an 'H' shaped unit to the size you specify after you mill the crap out of your 'real' top plate. Or fab a simpler one.
Aesthetics aside, it WOULD add CFM. Whether worth the cost and trouble-your call. Maybe it'll just inspire you to a better, more professional job than this.
Mea culpa...
PS- If this does catch-on and you sell 1000's of 'em, I will NOT waive my licensing fee...
