I "lift" the thread again to ask if anyone here could give me some measurements to make one for the Homelite 30cc, to know where should I aim for if I decided to give it a try (I can always machine a couple of "long" stacks and vary length and shape to experiment).
During this time I've seen more gas engines and they all have in common that many of them, like half or more, seem to have one, and with the high end of the slant backwards, so I start to think that in most cases it's just for aesthetics rather than for real performance. In fact, I believe a poor match even spoils or degrades some of it.