I kinda wish my seat had more than one screw. It kinda rattles on the frame sometimes when I sit or get up. (or maybe that's my old back, not sure).
I'm sure your battery case is different than mine, but if your neg cable is short like mine and hangs in the way, I always put masking tape over the neg terminal just so I don't slop some sparks coming out.
Good advice R_W_B...BTW, at your local hardware store there are some felt/rubber adhesive pads you can stick at the frame/stock seat bumper contact points to "tighten" up that rattle/seat movement a bit.:newsmile071: