THANK YOU!
have search everywhere after that!
I believe it's easier to make it into a item instead for a character since HBC's sandbag is on itemlist as 4F on hex :/
oh, also a funny thing I found in online trainings items, they are loading 2 types of items and both of them are sandbag O-o
you can change them into 2 diffirent items, the first one will load at the beginning of the game.
after the first one has disappeared, the second item will come out and after that disappeared, the second one appears again.
you can also change the trigger of which item has to disappear/missing for the second item will get load.where is 2 triggers and both of them is aimed into the second item