TU4 bulletproof: 820 --> 801

So back when I opened my first account in > 4 years in June I posted how my TU4 score dropped from 820 to 813 when the new revolver reported. I also took 1 TU hard inquiry (moving from 0 scoreable to 1 scoreable). At the time if the 820 score I was at AZEO. Since that 813 score I've moved to NZ / all accounts with reported balances, which is 9 of 9 revolvers (10 of 10 if you count my mortgage). Also during the time of reporting all of those non-zero balances I had my other 2 newly opened accounts land on my CR. My 813 score has dropped to 801. So, overall CR changes resulting in a 19 point drop from 820 --> 801: AoYRA/AOYA reset 1 scoreable inquiry Move from AZEO to NZ Average age of accounts drops While "bulletproof" may be a bit of a stretch, considering the changes to my CR I'm overall quite surprised/pleased with the relative insignificant impact to my TU4.