Yes, unfortunatly they can’t be polychained. And sequences can’t be transferred by midi. Sometimes I’ll record a track on 1 of them ( and as midi is can be transferred realtime ) send midi - out to the other ( while playing ) - to stack 2 different sounds - so to have 2 identic melodies on eatch instrument. - sometimes making a third or a fourth copy ( so it becomes easy to create accords just by transposing notes in the 3 copys around the original melody ).