adjust drop rate by edit item_radomopt_group.txt (ado-3)
use your favorited text-editor like notepad++ or ms word
eg.
replace ",1000,RDMOPT" with ",100,RDMOPT"
replace ",400,RDMOPT" with ",40,RDMOPT"
But my problem now is.. 3 option is more common than having 1 option.. i like 1 option to be common to have and 3 option to be rare or hard to have..