Have made some quick changes as per Mr D's recommendations. Bob1231... there's a Fernco connecting shower PVC vent to existing copper vent. At the top of the stack, there is a Proflex connecting 2" PVC vent to existing 2" copper vent which goes thru roof. I do want to switch the copper to PVC as the fitting around the vent is leaking a bit. I have a new one, but didn't feel like getting up on the 2 story roof just yet. Was hoping acceleration of gravity might lower a bit first. Mr D.... There is a 3" Wye under the toilet Santee. I do have a 3" combo available. Should I try to use that for the toilet?? First pict shows an alternate route for the shower drain. But there are issues with one of the holes that I drilled earlier as it is too low.. or that charred hole is too high. I've a couple of ideas to strengthen the joist. I like the strap idea the best, though I guess they would have to be pretty thick. Maybe a long steel plate on the top? As there is no joists at the edge of the wall all the way around the room, was thinking of leaving that lip of old subfloor for new subfloor. So a steel plate on top of joists would not be in the way. comments? Havasu... Are you crazy? I'll give you a finger!