The Iron Cross feels strongest to me when I roll my shoulders back, that way I am able to contract the lats hard and lock my shoulder girdle in the position. However a problem that I've run into is that I can only roll my shoulders back when I start in the Iron Cross position. When I lower into it from a support hold my shoulders roll forward slightly but enough that it makes a difference in how strong I feel in the position. Also in support I just can't retract my shoulders far enough back to just lock the position and hold it as I lower.
Does anyone have any tips or training parameters on keeping the shoulders back when lowering from support? Maybe I need to train my shoulders to be able to retract all the way in support? is there a trick with hand placement when lowering down that I can roll the shoulders back when lowering?