[Stenzio]

The Forgrint seems to be having a problem the Rexys and Gwandovyn had in the past, where they'd make your sub-weapon the shifted weapon type instead of itself when equipped in the main hand; and vice versa if its in your sub-hand, where it instead makes your main-hand weapon the shifted weapon type.

[Neus]

As far as I know they all function identically so you'll have to do some tests and report back with details.