Let's make it simple. For a true home to 1st time, have someone front toss and the moment you hear contact the clock starts. When you do that most 2.7 2.6 end up at 3.1 or 3.2.
I like the comment about OBP. Get on base, unless you are a 4.2 to 1st, then hit it out so I don't have to run for you.