Thanks for the quick reply David. I think I've done what you suggested but not sure with the intended results. Starting with a glass marimba software patch, I clicked the action menu in the library which gives me the option “merge following when loading patch” with the options of midi effects, instruments, audio effects, sends. I deselected “sends” as you suggested and saved this which creates a new User Patch Folder containing an alternate glass marimba preset/instrument. However the new patch also loads defaults sends for to Bus 2 and 4 and bus tracks in the mixer for space designer reverb and EQ. Am I missing something?