Hi, I really feel for you like all the others here in this forum. We all have our personal issues.
I haven't read through all the messages, but enough "not to see" if you have had multiple second opinions. Making this decision on your own is pretty scary. If you have had second opinions from places like Mayo, MD Anderson, Solan Kettering or other centers of excellence, just ignore my ramblings, but remember you only have one life, and do the absolute best you can do to make it a good long one and do absolutely everything you can do to make the best choices.
If I read correctly, your procedure is in a day or two and if you have major questions or concerns, maybe it's time to do a reset and get every concern addressed.
My attending doctors were very happy I went and got opinions from the centers I mentioned above.
I hope you all the best and go in with eyes wide open.
Cheers Dave