I worked on welding in the passenger side panels. I still have some work to do but decided to move on with the driver's side work. My welding technique leaves a lot to be desired and I was fighting a wire feed problem with my welder but eventually it will be functional.
When I removed the reinforcement under the floor that attaches at the mounting bolt the driver's side door hinge pillar dropped (seemed a lot more "flexible" than the passenger side was). Based on my experience on the passenger side I plan to fit the floor panel roughly and then get the reinforcement installed to the underside of the panel. I anticpate that will position the door hinge post vertical location correctly but will fit check the door once the panel is screwed in place to confirm.