Thanks, I was unaware of the TMK firmware release for ErgoDox, you just provided me with a lot of reading. I was afraid that it would require a recompile. The main reason for wanting it is so that I can maintain the position of my edit keys (undo, cut, copy, paste) on a Malt layout board by putting a layer toggle to a media/macro layer. So ~L1 in the R3C1 position and either the edit media keys or equivalent macros in their usual lower left position.