Glenn Schultz has been making wooden and CPVC whistles for years. A short while ago, I reviewed a Thin Weasel in Snakewood, and now am following it up with a review of a Water Weasel in Eb. If you wonder how the CPVC stacks up to the wooden whistle, wonder no more!
Volume: Louder than average. I was able to be heard quite easily across the loud bar with this whistle. It's pure, and just slices right through the crowd noise without being obnoxiously loud.
Responsiveness: This whistle is very responsive. Glenn's whistles allow for playing just as fast as I can play them.
Tuning: This whistle is in tune, when blown with the proper breath control. Like it's wooden counterpart, The G (an Eb whistles equivalent to F#) requires a little bit of a push compared to the rest of the notes, but not that much of one. This appears to be typical of Glenn's whistles, since I have two that are similar. Consistency is a good thing; when you get used to one of Glenn's whistles, picking up others won't be much of a learning curve.
C# (which is the Eb equivalent of a C-Natural): OXXOOO produces a C# that's perfect. You can push it a little, about + or - 10 cents, just like the wooden Thin Weasel.
Hole size and placement: The holes are well rounded, and centered nicely along the body. After playing and studying his wooden version, I expected no differently.
Air volume requirements: Slightly below average. I didn't seem to use as much air with this whistle, but it was pretty close to average. It's only just a little better.
Air pressure requirements: Like the wooden version, the 2nd octave has a bit of back pressure, but not very much. Probably less than the Syn whistle I reviewed recently. Just enough for you to know it's there. If you try to lean into it a lot, it gets a lot louder, but you never really get a significant amount of push-back.
Clogging: This instrument never really clogged up on me. That curved mouthpiece area must help..it'd get wet around 25 minutes in, and I'd blow it out, but it never gave out. Again, very much like the Thin Weasel.
Wind Resistance: Moderate. I could play in light breezes, but stronger gusts of wind cut this whistle out. I'd be able to play it outdoors at the Texas Renaissance Festival (in Houston) without a problem, but probably not at Scarborough Fair (in Dallas) without having to account for wind. It's a bit windier up here than down there.