Sure. be back in  a moment

From this

To this

Just use some pinstiping tape to make a good line from the body line to as far down & back as the inner body is.
CUt with in 1/2 to 3/4 inch from the tape, and slowly with a small pair of pleirs fold ove the edge to make a lip.
Then with a BFH, bend over the inner lip on the tub, flat against the floor..