I've got a really stuck freewheel. I put the FR-1 tool in a vice, put the freewheel into the splines on top, and put as much force as I could turning the wheel counter-clockwise and it didn't budge.

I'm just trying to remove it to rebuild the hub. I suppose I could leave it on and rebuild from the other side? (The cogs on the freewheel look fine and it spins just fine).

I haven't tried soaking in anything.