ok so here it goes :
1) Buy a weapon and manny enchant scrolls
2) Go to warehouse and deposit all your scrolls, but keep one only!
3) Put your scroll on a F1 (or whatever it is) shortcut
4) While cliking on "deposite" press "TAB" key in order to have your inventory AND your warehouse deposite window
5) Put your warehouse window just on the inventory one then press your F1 key, clik ok on the warehouse window and clik on the item to enchant
Now, what i got from this trick.....
Case 1 : No item lag => the scroll disapear quickly, and even if the enchant fails, the weapon doesn't disapear. Even if it succeeds it doesn't take any effect...
Case 2 : Item lag => I didn't got any fails, maybe it's just luck, but the scroll did disapear AFTER the enchant being applied (success only...)
That's what i've got... I play on L2 Extreme KASTIEN... I'm still working on it...Hoping to get a good weap before they nerf the scrolls T.T