Bob,
Only 4? Heck, that's a walk in the park! Remember, it is the digital age and you don't have to shoot them all together. That's why God invented PhotoShop.

My record is 7 Duck Tolling Retrievers and only one head needed to be swapped out. Never again!!!!

Good luck and please share. To snicker, you place your tongue on the roof of your mouth and go "schmufffff" .