i think i started using my own bags pretty early, because i liked them alot, but they turned good, and i mean good in other peoples eyes, not only mine, after like 60+ maybe. but i did one or the other good bag before that, even if these have been lucky shots at that time.
my early bags were mostly traded out, lost, given away or shreded to death due to stupidity and lack of controll (like symp mirage on concrete floor and then rub the bag over the ground > die)