Thanks Neal. There is enough room, just barely. The piece you see is a little bigger than a 2x4. The piping will come out and be rerouted properly. Same with electrical, but for giggles, the light fixture you see in the background is in the back of a shower.
Thanks, I too have several HF tools, and they've held up to plenty of abuse.
As for the screws, one of the other reasons I like them is because they create less shock compared to pounding on nails. I've found some lag screws to break easily, there may be more quality issues with them than screws.
I've got the angle drill attachment, and have also used wrenches and sockets to tighten some screws where there wasn't much room.
When I get to this job, I will support the joist and take out the added parts, trim the joist to make the cut area as close to square as possible, then put in a carefully cut-to-size piece and sisters. And fill the damn holes with parts cut from dowels.