I tucked the excess material under the panel per the instructions here are some pictures with the excess tucked rather than trimmed.
Attachment 13760
Attachment 13761
Its hard to see, but where the material is tucked under its raised just a bit. I didn't notice it while shooting and it doesn't affect my grip in any way.
When installing the grips, until you heat them the grips are "tacky" instead of really sticky. If you don't like the placement before you apply heat you can pull them off and reapply until you get it right. Take your time getting the left side panel correct and the rest falls into place as you wrap around. I used the Mag release button, the cutout for the beretta logo, and the bottom of the grip as points of reference to line up while placing the left side panel. Once you are happy with the placement apply heat with a blow dryer to lock them into place. The material will tighten up around the texture on the front of the grip once you apply the heat.
These are my first Talon grips and I really like them, they help maintain a positive grip and feel comfortable with a tight grip.