@peter-ostry My thinking is that I want to create as dry an atmosphere inside the airway to counteract any possible humidity that might have accumulated outside the airway (i.e. in the electronics area).
I do swab the airway with three oboe cloths after I play. I think (and it appears on inspection) that, after I swab, there is no significant visible moisture. In any case, if there are tiny droplets of liquid remaining, it does not appear that they will "drip off" - they are tiny, and there is a significant bevel at the foot end of the airway that would catch (and retain) any tiny water droplets.
Yes, I do not think the 5° tilt is needed! However, it has an appealing feel and does maybe add a bit of safety.
One concern I have is that there is a noticeable metallic, electronics aroma from the mouth of the Sylphyo. It seems to vary in strength based on how much I play it. Have others experienced this??
Another concern is that the internal airway of my Sylphyo does not appear to be "sealed". If I block the bell port completely and breath gently through the mouthpiece, air freely escapes ... to ?someplace?. It is not escaping from around the mouthpiece, so it must be going someplace in the body of the instrument.
In any case, this is not a major issue ... yet. I am taking these steps to avoid a potential issue down the line.