You are welcome.

I got to thinking more about it and it seems to only work like this if the engine is mounted upright. If the engine is inverted then the slide valve is setup wrong for it. But it ought to work OK if you more or less reverse the slide valve adjustments. As you turn the engine/plane upside down to make the engine adjustments, once dialed in, and then flip it over right side up (inverted engine) and make the slide valve adjustment.
Then if the engine is mounted horizontally, it would appear to only work depending on if the engine is inverted doing certain aerobatic maneuvers such as a knife edge on that particular side. Most planes knife edge with the nose high, so that is doubtful to work in those cases.