There are people that have not gotten a single +8 out of 100 armors. It should average to 17.361(value wrong, should be 52.08 so not as bad as I thought) armors per one +8. I my self have seen +5 and +6 working correctly but when you try to go to +7, you get a chance far lower then 40% chance. Taking 20 armors from +6 to +7 only 3 out of 20 of them actually made it to +7. That is 15%. That only has a 1.235% chance of even occuring assuming the chances of success is 40% (The chances of getting 3 or less success out of 20 items are 1.596%). I know twenty examples is rather small but taken with consideration of 100 armors and no +8 makes me wonder. I have also seen a lot of other people reporting it being harder to make overups.