actually, enchant rate on L2 is kinda like this.
lets say serv owner fixed the rate to 50% , this mean from 100 weapons done by the respective players ALL IN THE SAME TIME, 50 will succeed.
most of ppl belive that if rate is 50% , if he will enchant 100 weaps 50 will succeed but is totally wrong , bcuz as i said , if the weapons are enchanted ALL IN THE SAME TIME.
so this trick may work, since u enchant fast =/= but almost enchanted in the same time the respective weapons wich increas your rate.
it may be wrong but it has a logic :)
and u all cant deny that "pure luck" is kinda too luck sometimes , u all enchanted weapons like this, or with weap in hand or offhand or droping it down and pick up, or in soe , or hitting a npc, and from serv to serv some of them work like charm :)