I'm pretty sure I already said that I now realise the convention for high run attempts is a continuous rack break rather than an opening rack break.
This is the kind of thing that needs to be agreed upon for "ratification" purposes. Either way (start from a continuous rack break or start mid run) could be the decision - but from a logical point of view, and for the sake of the purity of the game, my preference is the former as the latter gives free balls at the start of the run. It's maybe a moot point but if the game is going to establish "rules" for a "high run attempt" then those rules need to have some internal logic and coherence.
On another note, those who think cue ball fouls only is acceptable contribute to pool being laughed at.
I feel part of that issue is that there hasn't been a referee for these high runs -- and by that I mean a neutral individual who is not, or cannot be accused of being, beholden to the guy shooting.
So it has been CB fouls only or if you prefer, the call going to the shooter.
Lou Figueroa