The screws which I loosened and tightened are as follows. I'm still uncertain of a technical detail which would be ideal however this is what I found. My write up probably shouldn't be taken as fact, but only as a point of consideration to be included with personal evaluation.
Grill - A few screws on top then lift out the grill. Pull the grill up and off. There is a sensor on a wire which is removed and replaced later at time of assembly.
Bumper - 2 in the front, 4 on top. The original design seems to look like the bumper will be in correct location naturally as the screws don't pinch the mounting tabs firmly. I put washers on the screws to allow a firm hold and better alignment. There are some brackets which mount on the sides of which have a sort of clip to hold the bumper.
Headlamps - With hood open, per each headlamp there are two tabs on top of the headlamp which flip up to reveal two screws and a third screw on the front of the headlamp. With the screws loosened the headlamp has some play to put in a natural looking alignment to grill, bumper and fenders.
Fenders - have 3 screws on top. When loosened the fender moves slightly to provide clean looking alignment to other parts.