The test data I used that yielded the incorrect outputs was: 

Span L1: 115 
Support Angle 1: -17 
Conductor Angle 1:-22 
Span L2: 125 
Support Angle 2: 0 
Conductor Angle 2:-6 
Conductor 7/4.50 (Al) 
Height change: 1 
Tag line angle: 0 
VF = 25%: 111 
VF = 25%: 189 
SAG 2 (I): 3.3 
SAG 2 (F): 1.7 


-- or -- 

Span l1: 115 
Support Angle 1: 5 
Sag 1: 2.9 
Span L2: 110 
Support Angle 2: 4 
Sag 2: 2.7 
Line Angle: 0 
Conductor: 19/3.0 (Cu) 
Height change: 0 
Tag Line: 0 
VF+25%: 36.2 
Tension: 680 

As far as testing and roll out - We (spoke to Steve) would like to roll out onto all OH tablets (of whichever profiles will see Live LIne), and call it "Program under test: new live line tension calculator" (as the last item on the list).  It's important we write a warning somewhere that says that the results may be incorrect, and it's currently undergoing testing . This way, most people will still use the existing programs.  But the people we ask will be able to find the new program, and test it within a time frame, and we'll provide feedback afterwards.  Once everyone is happy, we can remove the 'old' programs, and get the new one in poll position.