Really an excellent result for you - especially after such a long time diagnosed. It just goes to show what can be achieved, albeit with a dollop of good luck.
Please don't think I am diluting your result in any way, I'm absolutely not, more just acknowledging some of us are lucky enough to have remained healthy enough, one way or another, for our bodies to be able to regain these levels. Post-diagnosis, I too achieved good HbA1c scores, but I do thank my lucky stars ever day that whilst I'd really rather not have had the diagnosis, at least I've had the opportunity and good fortune to be able ito make a difference.
Keep up the good work.
I'm sure you must feel like walking on air.