This is a topic that has been discussed several times but if anyone has settled it once and for all I've missed that post. The generally accepted standard for dislocates is shoulder width + one hand width both sides. However, there are those who think 'shoulder width' is when your hands are vertical while others say your grip is shoulder width when your thumbs in an overgrip dislocate are aligned with the edges of your lateral deltoids. In the latter case your arms will not be vertical, of course, so it makes a difference.
As for shoulder extension, is it the same grip width as for dislocates, whichever of the two described above it might be?
Could Coach or someone else of high authority please settle this question once and for all? To make it clear, I'm only talking about the dislocate width required to progress, not the long-term goal of achieving a shoulder width grip.
Here is a video where I demonstrate different grip widths. At what second mark do I have mastery dislocate grip width?