Thinking of suitable pipe for my coming WS7II that will run on a medium sized track. I'll say bottom end is the play. After reading many, I'm quite confused. Many commented the 063, JP-1 and T-2050 are good with this motor, but never mentioned about the length of manifold to use. Someone says WS7II cannot blast like S7 at the bottom end, unless getting a longer set of pipe. So, that guys recommended to adapt a longer manifold. But I didn't see JP-1 and OS had a longer manifold on the market, expected RB. Now, I have my choice here, RB 063 with short manifold and T-2050. Is longer manifold really the case?