I can't speak for the people recommending trying a controller, as I've never tried it on this game. I can recommend you invest in a Tartarus or something similar, though, if you really enjoy SAM. Rebind the keys so ctrl1 - ctrl5 are on the top row, the second row is 1 - 5, leave shift and tab alone, and set the rest in order from left to right as 6 through =. Set the thumb button to left ctrl. Now you have hot keys on one hand for 3 full bars: regular bar, shift bar, ctrl bar. You can drop the F keys entirely. You have a joystick, ctrl, and space on your thumb. You almost never have to take your finger off right click. Takes a few hours of getting used to the setup, but your keyboard becomes obsolete other than for typing and opening your inv.