I have no problems with doing homework, done plenty of it myself. But sometimes we can just try something if it passes the common sense test, and it will usually work fine.
I see this in the aviation community....get three engineers together and watch them postulate about the physics of holding a torque wrench. While they are arguing I replace my plugs and go flying. ?
Just got back from giving a new couple a ride to their wedding reception. They and their guests loved the Plymouth.....and nothing burned up!