To me this is a question about touch. I do not make big changes to throttle down. Yes, I shorten my run up to even stand and deliver if necessary and decrease my reach back, but practice allows me to not think too much of these points. Usually thottling down moves me to a mid range or putter, forcing me to work through my clean form check list. Touch is really develop through practice. Just like any other part of the game, getting out and working with your mids and putter at a target will develop the muscle memory needed to improve this part of the game.