When to begin timing boil

[ishkabibble]

Just so i know I'm not falling into a bad habit/misconception, the 60-min boil begins @ the hotbreak, yes? Meanwhile the technical boiling action begins 15-20 minutes before the hotbreak egg-drop appears.
I only ask this because my last two english beers have weak bodies, and since my temps/times are good elsewhere, I just want to make sure I'm not boiling the hell outta my brew

 

[Trox]

I usually wait until after the hot break to add my first hops and then start timing my boil. My understanding the hour boil is more for the hops, and so any extra boil time won't hurt the wort; except maybe darkening it a bit more.