luck of the draw, breaks, and script settings and countless of other things to take into account, the new account i have there atm is 85/95/85 and had a lot of luck with it so far.
until this, went to go repair dh and i had enough to repair the armour, which it did, but it had 10k in inventory and it just sat there for who knows how long, so maybe that's something to look out for?