I am thinking of fitting utcomp to 1970's VW camper van which naturally has no built in sensors. Most seem to be easily set up, with the exception of finding fuel flow which is sensitive enough for very low flow rates, eg 0.08 liters/minute. Fuel pump is mechanical with just a flow to the carburetter. It would be possible to loop fuel flow back to the tank but concerned about continuous pump activity. Anyone have any suggestions, methods or sensors?