Midjay plus, Midjay Pro, SD40.. l am new to these devices. I use the X4. It's been a workhorse for me. I purchased the MJ Plus when they 1st came out. I could not get it setup to replace the x4.. I could not get it to transmit midi out when in the keyboard mode. I have tried everything I know of to do it. Question.. is the MJ Pro and SD 40 the same on transmitting midi while in keyboard mode?