And also inHope, once they start to do the exercises and get vibrato, each one will on there own have to practice slowing it down.When i first started singing, mine was real fast, i taped myself to hear how i sounded, thats when i started making adjustments. Now i can speed it up, or slow it down , depending on the feeling of the song. Tape some of your rehersals, when you listen back, you'll see what i mean.
But by the way, your group sounds very good, so keep bringing the fire, and He will bless you..