awesome! I love hearing about older boas.
My oldest is 27 and have two that are 18.
I hate to say it but the boa is a little heavy. Boas should have more of a square loaf shape and he's pretty round and heavy. He's not obese or anything, there's no fat folds on the tail but he looks like one of my big females when they are gravid.
Anyways.
I am glad he's doing so well for you and I hope you both get many more years together!