Hamelman's whole wheat bread

Well this is my 2nd attempt at Jeffrey Hamelman's whole-wheat bread. The first turned out pretty well so my wife requested more (the best toast ever according to her). I started the pre-ferment the morning before work, mixed up the dough after work and then fermented/proofed. Unfortunately time was my enemy as I was unable to allow a full final proof. As a result I had some out of control oven spring action I think. No matter, tasted better this time than last! (different flour)