Rebound with the ex?

SO left almost a month ago. I'm getting to the point where I'm surprisingly okay with it now; being alone for the first time in my life is a challenge but does have it's perks.

Anyway, I've been debating and doing research on rebound sex and thinking I could mentally/emotionally handle it. However, I'm not about to sleep with some random guy. My ex-husband and I had a FWB thing in the past before the most recent ex and I got together.

Ex-husband and I are both aware that we are much better friends now than we were most of our marriage and there isn't any chance of getting back together. He's on board with it (what single guy wouldn't be, right? lol).

Do I go for it and have mind-blowing sex (and maybe get the last of the most recent ex out of my system)? 9