Rocky,
I just had my 15 month cysto. Because the BCG was used on a 6 on, then 6 weeks off then 6 on, it as my 4th cysto. My URO believes in the 6/6 as opposed to maintenance of several 3's. His rational is every time he pokes or does BCG there are risks. Based on just 1 small high grade tumor 15 months ago, and clean bladder plus cytology after BCG and the way I looked inside he suggested going to 6 months.
So I am with you going to 6. Not sure I will ever OK a year. Too long and too easy for something to grow!
Good the hear your good reports!