I just want to say that I still struggle with the timing on this. I have a tendency to play this slide into the B string as a triplet – where I can hear all three notes separately. Timing-wise, it works OK. But, it sounds much like swing rhythm. Your exercise (and the tablature) makes it clear that we should strive to make the fourth fret tone right about the same time as the B string is played. The same is true for most other slides and hammer-ons unless they are written explicitly as triplets. Please correct me if I am missing this. And thanks for the help!