Ok, I'm new to this and this question may already have been covered. If it has, just post the link. I recently purchased a L3200 and I learned from the dealer that anyone that has a L series Kubota can use their key on my tractor. And sure enough, I have a friend with a L and his key starts my tractor. I'm not comfortable with that. I know I can't be the first to address this issue. What options are out there? Replace ignition switch? Some sort of ground disconnect? Any help will be Appreciated. Thanks