Howdy Chinook, thanks, thats good info. That tells me that the gun is just a little too jumpy for ya.
The VZ's may help a little, or at least for a few mags, then poop out on ya.
If you need more help try this.
Now this goes against most modern training, but if it keeps you for ditching this little wonder, who cares?
Assuming that you are right handed, with your left hand, take your left fore finger and bring it up to the front of the trigger gaurd. Now you want to curl that finger around the front of the trigger gaurd up to the second joint if possible; almost like you were going to shoot a double action trigger.
Now with this finger, you apply pressure STRAIGHT BACK- just like you should with a trigger. This is the reason trainers don't like this method. Most shooters have a hard time pulling STRAIGHT BACK. Most shooters pull to the left. Therefore, their bullets miss the intended target to the left.
It will feel weird and require practice, but I assure you, this will reduce the hopping of the gun, thus reduce/stop the finger biting. ( I've gone 150 rounds no problems)
Also, if you can practice both thumbs forward, this will give you the highest possibe grip and the Most grip possibe, thus more control over the gun.
I know the pic looks like all thumbs and fingers, but keep in mind the size of the gun.