Solidifying shower floor??

Thanks for the replies, and nice job Bruce! After looking at some of those videos it seems people do a range of full removal and rebuild like Bruce to simply cutting pieces of wood and stacking them to create support. Similar to some of the videos, the reason I even looked at this is our shower drain was leaking. Saw it dripping from the underside of the camper. I removed the access panel and reached in to make sure all of the PVC nuts for the drain pipe connections were tight and they seem to be. And, it only seems to leak when my wife or I are in the shower. When my 70lb daughter is showering it does not leak, so I am convinced the flexing is casing the leak. Ironically our dealer just completely resealed our shower seams due to a **** job done by the factory, so I would prefer not to pull it if I can. Going to try some of the other options first knowing that I can always pull it out and rebuild if needed. Thanks again!