Glad to hear you are getting a drip tube to time your injection pump. I think this is the easiest and most accurate way to do the job. I've used this method for the past 34 years with very good results. I made my own drip tube from an old injection line. That way I wound up with two drip tubes. Good luck.
Bill Lewallen Lexington,Ky. Where diesels purr and turbos whirr.