Clean and reset the zenith carb on the model A yesterday that took 15 mins. Ok 20 min. Touched the points with a file reset them went through the timing procedures 35 minutes. Turned ignition on pulled choke pushed starter switch on floor viola runs like a top. A lot different than the first time I set the timing that took about 4 hrs to figure out. There’s a lot of “feel” to be able to get it just right. Cool engineering simple and complicated at same it.