That's not encouraging. I hope this latest attempt works out for you. Meanwhile, I'll be awaiting the inevitable oil stains in my carport as I watch Youtube videos on how to perform this repair .
My experience replacing the unit was about the same as BenchTest described. It’s not a particularly difficult job just frustrating at times. That crossmember in the engine bay is your best friend and I too stood on it for much of the repair. Wear good supportive shoes! If you have one of those articulating ladders that have multiple positions that may come in handy as I put one section inside the engine bay and the other end on the garage floor to form a flat platform to sit or lay on. The laying down part didn’t work so well for a 60 year old and sitting on it requires reaching over at the waist if you’re tall. It’s mostly basic hand tools and a torque wrench job.