Hello to all!!
Thanks to the great advice from some on this whistle board.
I just received my Hoover Low G & Low D from Mack Hoover (CPVC)
All that I can say is: WOW!! 
They are great!!!
I love the look of the whistles.
The finger holes are just great.
I can play the low D with the regular fingering.
The air requirement is very good, I’m asthmatic & I have no problem playing the whistles.
Most of all they sound great.
All of the notes are easy to hit!
Thanks so very much to Mack!!
I really got my money’s worth!!
In the future, when I order whistles, they will be Hoovers!
I know that these are my first low whistles, but they are what I wanted my whistles to be! 
Thanks to all who gave me input to my questions.
This is a great board!
