While you are on the site, in your browser find and click "Add to Home Screen" A CGN beaver app icon will then be created to your phone that is directly link to the site.
Note: This feature may not be available in some browsers.
I expect many that were built for the T3 will accomodate the TX1. The TX1 has an attached mag well so does not rely on the mag well in the chassis. The actions are the same profile.