sandwedge
 

Instead of a horisontal hinge action for a high shot over something, is it just as well to have both an open stance and and have a very open club face at address (or use a very weak grip)?

I think you mean Vertical hinge.

Either way you can do what you say. The options are all open to you.

Yes, I have got them mixed up. I find vertical hinging difficult. Maybe angled hinge gets the job done to get the ball high enough with a SW/LW, although it will roll a little more?
By the way is it the bounce of the SW or the leading edge that hits the ground?

Do all TGM players use vertical hinging (when they want to) or can one get away with another solution even if one has to make a high, short shot?

I find vertical hinging difficult. Maybe angled hinging gets the job done to get the ball high enough with a SW/LW, although it will roll a little more?

By the way - is it the bounce of the SW or the leading edge that hits the ground in these types of shots?

I have no idea if my 56¤ SW has a big enough bounce to want to hit the ground first or if it is better to let the leading edge do the work - except in the bunker (when the sand is not wet and hard), where it's best to let the bounce bounce out of the sand instead of digging deep into it.