On 2011-02-08, at 12:53 PM, Ian Fritz wrote: > At 12:47 PM 2/8/2011, Jerry Gray-Eskue wrote: >> Apparently there are 5 independent variables, R1,R2,R3,R4 and R5. R6=R1 and R7 = R2. > > Maybe I misunderstand, but I believe R3 = const - R1 - R2. Correct R3 = K - R2 - R1