Transitioning to litter robot

I just got a Litter-Robot and my kitten actually used it right away, which was a huge relief. I’m trying to figure out the best way to transition her fully though. I have an old regular litter box downstairs that she usually prefers, but I really don’t want to leave it out and intentionally keep it dirty to make the Litter-Robot more appealing. The smell is just too much.

I also have a regular litter box upstairs that she uses sometimes. My idea was to keep the upstairs box available, leave the downstairs old box out for only a few days, and then remove the downstairs box completely so the Litter-Robot becomes her main option.

Does this sound like a reasonable way to do the transition? Any tips from people who have done this without having to deal with a gross old box?