Wow, that's quite a weight gain (40 lbs in a year). Also an impressive drop (-20 lbs in 3.5 months). Happy to hear you are succeeding in taking it back off at a good clip.
I think it's good to go through this once -- put a bunch of weight on, realize it's made life harder and less pleasant, then go through the process of taking it back off. Makes it much easier to keep control of your eating in the future... you can always remember what it was like when you had your sloppy belly and meaty jowls.
May you lose the last 20 before the end of summer!