There have been several postings concerning calibrating the TR3 fuel guage using the MGAGURU method published by them; however there are several comments that the procedure is the same but the resistance is different. The resistance used in the mgaguru procedure is 68 ohms. If this is not the correct resistance, what is? To make matters more confusing, there have also been several comments to the effect that they have used this procedure with these resistances and it has worked fine. Should I consider this procedure to be adequate and go with it or continue to attempt to find the correct resistance for the TR guage?