I do not think that will work effectively as the front pipe would be blowing towards the exiting gas of the rear pipe. A big fight in the middle (or rather halfway up the pipe next to fire) and the only retreat is out either side, reluctantly.
The original cruciform at leat allows the escaping gas a choice of paths and the pulse will have the effect of drawing the next pulse into whichever path is favoured (RH side)
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