Glad you like them erehwyrevekool, more to come too hopefully.
Thanks Tixx, i haven't yet ordered the whistle in plastic so i'd really appreciate some feedback as to how they sound in the different materials.
Some of the objects i've ordered in plastic have had a build-up of powder in blind holes.
The whistles may well have this problem so a tooth pick will be needed to try and break up any clumps at the bottom of the sound chamber.