Initially, I was skeptical about the design of the tank Scale.  The Blue Rhino propane tank I used did not have the easy carry lip aligned so that it would properly fit on the scale.  I searched for a propane tank that would align properly with no success for three months.  Then discovered that Blue Rhino DOES make a tank that aligns properly.  Problem solved!  
Another issue I initially had was the connection to the tank leaked propane.  After changing tanks, I discovered that it was a bad tank and had nothing to do with the Webber Regulator connector.
All is well now.