It seems there is not a direct way to have an assigned control button (IP6 or front panel) that updates/overwrites a preset (with current settings); I have a client who has made some level adjustments with their system and would like to be able to save them without me having to come onsite and do a preset save/overwrite for 2 mic channel levels.
Its a Church application that has their regular service and a spanish service that uses different inputs, so 2 presets are frequently recalled with a few adjustments. it would be nice to be able to easily update those 2 presets with new levels (they are controlling levels via IP6)
Again for the end user to be able to update their preset based on the limited control they are able to access (individual channel levels) would be a handy feature to be able to provide to an assignable button.