I have successfully used the scorpion on a Texas hunt. I am a big advocate of not calling to loud. If you want more volume you can add either a Foxpro SP-55 or one of the TOA speakers(Also can get the TOA's directly from Foxpro).
This will give you plenty of volume.
I also have a Fury and the scorpions gets used much more due to the compact size.
J.Weber