Since I couldn't use an I06 with the VVproV when I got it yesterday, I used an HH357. Those HH357's require a quick hard draw to work right and with the whistle tip that came with it that meant the drop on the end of the tube went right into my mouth.
BTW, the rolling fix for getting the fire button to stop sticking in "ON" has continued to work.
I've scrounged up some crappy tube that I should be able to modify so I can get an I06 to work. It will be ugly until I get something better looking, but it will mean much less
juice in the mouth.