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.
Depends on what you're doing. For sights and other parts that need to stay put, silver soldering is required. If you're soldering on blued steel, the bluing needs to come off first too. Then just use whatever flux you have. It comes in jars usually.