Not to hijack..... but whats the deal with the 'dual side firing' middle burner???? I noticed that my neighbor's 1000 has one (he wanted to replace just for the helluvit but I told him no) but I have not run into any dual side firing middle burners with all the Bs I've picked up ---- they have all had a single row of holes on the top of the burner....... Where do you find these burners and are they any better than the single row burners? I look more for the rectangular hole burners (like stock) over the round hole burners....