Hi Pat,
The welcome wagon here...rolling on in! You will find lots of good people and advice here!
I'm not a Ross procedure fan, and I'll tell you why and you can take from it what you want. I have congenital bicuspid valve disease also, of the aortic valve. In 1997 I had the Ross, which already makes you a double valve patient. I didn't take this into consideration, then. Flash forward to 2006 and I had a dilated aortic root of 4.8 which progressed to a 7.0 at the time of the last measurement before OR. At my 2nd OHS it was 8cms in the OR held in place by scar tissue, according to my world reknowned surgeon. My aortic valve was "shredded" and fell apart in his hands. While everyone's situation is different, I have come to see on these boards and while looking up stats, that many "Rossers" become aneurysm patients. The thinking being that the pressure of being in the aortic position is too much for the pulmonary valve, thus aneurysm.
Now, back to you. It would seem time is on your side with this, barring any other complications. If I were 1. asymtomatic and 2. under 4cms, I would not worry, just get your regular checks done and follow up with any questions you have. The benchmark is around 4.5 for surgery from what I have gathered over the years and in my research. I'm not a doctor, just giving you my two cents.
Again, welcome...