Diagnosis of engine problems is kind of like shooting pool. You should try to make the easy shots first. Rebuilding the carb is definitely not the easiest shot.
I guess I suffer from familiarity complex. I've rebuilt so many carbs in my lifetime that it seems like second nature, and it's something I would do even if I didn't think the car was acting up or the cause of the problem. Especially the older one barrels and two barrels I find extremely easy to do.
I guess it's not that easy for some folks.
