Watch the floor shape under the B pillar, the floor plates I got overlapped a 1” tall step. I didn’t like the gap between the plates and floor, I was worried it might continually loosen until it finally compressed the floor flat. I had Kert make me some plates with a step that fit great, I got the feeling he thought I was overthinking it but it made me feel better.
I also had him make me bigger C pillar plates so the bolt holes all landed on a high rib instead of the gap.