47-55.1 Easy Floor Panel Installation Question

[Dongray]

I have what should be a quick easy question. How is everyone tying in the aft end of a floor panel with the flange of the seat riser? Do people just overlay the floor panel and bead weld the new seam? If so what haapens where the floor panel steps down off the seat riser flange? I have seen one person cut the original floor from underneath the seat riser flange and install the new floor under the flange. It looked completely original but I'm not confident I could cut the original floor and not cut through the seat riser flange.

Thanks!