Many Thanks for the reply Bernie

I bought an SD2 hoping to link it to either my X4 or X1 Keyboard--they are both the same apart from no keys on X4 Arranger module.

So far no one can tell me if its possible to play the Midis on the X4/X1 and have the sounds coming from the Sd2

I managed to link them via midi and can have the midis playing on the X1 or X4 using what I think were the SD2 sounds -they certainly seemed Fuller- but the problem is that I cannot then SAVE those settings on the X4 and I notice as well that MUTE button cannot be used while using this configuration.

I am guessing its something to do with the Midi settings in the X4 but I tried them all with no luck