Hi, your code has a minor issue, the extra attack will be void once the weapon is enhanced by fusion, here's a updated one, I'm using mipha as an example:
[Mipha's Weapon Modifier]
80000100
51130000 4C166274 78032000 00000090 58190000 4C022968
78030000 0000000C
64090130 00000000 000005F8...