Rockets were Z, lol, though if you tried that you need to make sure you weren't out of rockets either.
Like I said, I probably should have posted the controls somewhere. I've updated the page since I made my first reply to you so hopefully future people don't run into the same problems.
And yeah I did all the testing with the twin linked lasers. I sorta wish I had given rockets more of a presence, y'know? As it stands they're a marginally better, slower firing, limited ammo option that only has some very specific uses.