I recently acquired an X-Touch Compact for use with my XR18. This thread has been very helpful. I now have the MIDI programmed to use Layers A and B for faders, mutes, and pans. The MIDI dump function is necessary to synchronize each layer. If no ther controller is being used, the dump is only needed once per layer. If you have any controls duplicated in the ywo layers, you need to update (MIDI dump) each time you switch layers. I have programmed the "Play" button for this in both layers. I had trouble getting this to work until I updated the firmware in the XR18 to ver 1.17 (it was at 1.09). Now it works fine. I am considering a mod to the X-Touch Compact; a couple of diodes might be able to do an "or" functiion from the layer buttons to the play button making the MIDI dump automatioc upon switching. I'll have a look inside the unit to see if this might be easily done... UPDATE: I did the mod last night. It's a bit tricky, the solder pads and traces are TINY. I managed to get a couple diodes in there, now either the Layer A button or the Layer B button will also activate the Play button, which is programmed for MIDI dump from XR18 (MIDI channel 1, CC127, value 127). It works great, now the X-Touch is automatically updated every time I switch layers. Note: Not an easy mod. I wouldn't recommend this to anyone who is not well experienced with PCBs and soldering. The tiny traces are very easily damaged, and obviously this would invalidate your warranty. I did this on a used unit that I picked up at a low price.