Do you currently have Sampletank 1 or 2 LE? I'm not sure if Expansiontank modules will work with Sampletank 1 LE, but Expansiontank disks do come with Sample Tank 2 LE. So if nothing, getting an Expansiontank disk will get you up to a newer version of Sampletank. (thats assuming you currently have Sampletank 1) If you have Sampletank 2 LE already, I'm assuming you should be good to go since Expansiontank comes with ST2 LE anyway. More info here.... and