And what is the purpose of this 'great system'?
If you are going to plan fuel consuption down to the nearest 5 minutes it may have a purpose - except I have towonder what on earth you are flying that justifies such precision.
But bluntly it is completely pointless. To get the necessary levels of accuracy - you need an accurate fuel flow and totaliser - if you have that then all of the rest of it - - - is pointless.
Typically I have about 2.5 hours of fuel reserve - virtually guarantees me another county, countrt or continent........... depending where I am.
Whatever rings your bell, what do you genuinely think this adds any value?