I have the rocker, inner and outer B-pillar pieces, and the lower cowl panel welded in.
Next step is to get the lower quarter panel fitted and welded in, then start leading the seams. To position the quarter I set the door in place to match quarter bottom to the door bottom and make sure the bottom edge carried the same line. The edge of the door (black) was blending into the black frame so I added blue tape to the edges of both panels to help visualize the line better.
Fitting and finishing the cowl panel:
B-pillar brace.
Rocker in: