Dentmedics,
With our kits, you have the option of drilling the end of the crack or not, it is your choice.
It has been proven that over and over that a crack of any significant length (3 inches or more) holds up over time much better when using the drill and pop bullseye method.
The majority of our customers warranty all of their repairs for life, so holding up over the long term is a very real concern to them, and that is why we recommend this method for crack repair.
[b]Jeff Higgins
Delta Kits, Inc.
jhiggins@deltakits.com
www.deltakits.com</p>