[Weightshift]

When i use the 'right foot back' drill i don't come OTT - i'm thinking because i can see a nice big alley way from the top back down to the ball (i.e. right hip is not in the way). Is this still related to weightshift? i think my OTT is subconciously avoiding the elbow/hip collision because i'm definately not intending on doing it.

When i think about the pivot or weightshift however i tend to get to much swaying and leg drive going on....

You have to approach this problem in baby steps. Try the feet-together-drill with Pitching Wedge to Driver, then short chip shots with the irons, slowly increasing stance width. It's not something that's going to happen overnight