looking for bends on a casio MT-52

[smojo]

Hi, just bagged a Casio MT-52 for a fiver in a charity shop. Looks a pretty cool keyboard as it is but fancy finding some bends. I've seen that you can tweak the internal pots on the drum sounds and you can mute some of the rhythm sounds but has anyone else bent one of these and if so can you tell me what is possible on them. Thanks