Hi all, Thanks to help from Steve Lenham I've put together a PDF of the Elka MK76 schematics and PCB layouts: https://docs.google.com/leaf?id=0B8-c_o3c6OJAY2FjYTU1MzMtZDA2MC00Y2YxLTlhN2QtMmYzMmMyY2VmZDNl&hl=en_GB Now you can see an example of a poly aftertouch solution. Feel free to copy and share. Cheers, Neil -- http://www.njohnson.co.uk