Hi and welcome!
the surgeon you have named in your profile is not known to be a DS surgeon. Or maybe that's who did your old RNY, and you are seeing a different surgeon now?
One of the things we're seeing now is that some RNY surgeons are starting to do the SIPS on at least some of their patients. While we think the results from SIPS will be better than RNY, and it will avoid some of the miserable side effects of RNY, it is still an experimental procedure and long term results are unknown. Also, while it's slightly less complex to do than the DS, you are looking at RNY to something (SIPS or DS) revision, which either way is going to be a very complex procedure. It will require a complete reversal of your RNY back to the original anatomy, and THEN doing either SIPS or DS from scratch. SIPS has one less anastomosis (bowel to bowel connection) but the one that isn't needed is the easiest part of the whole operation. All the challenging stuff is part of either operation.
So what I'm trying in my long winded way to say is that you need a surgeon who is very experienced with revision of RNY to DS, not just someone who does a ton of RNY surgery, not someone new to SIPS and/or DS.