Hello I was wondering if there is anyway you can "lock" the master volume knob like the rest of the knobs? If I or someone else mistakenly bumps into my gear and hit any knobs its no big deal because you have to hit save...Except for the Master Volume! If this gets bumped your screwed. Anyway to set this knob to a specific setting and just lock it there? If not it sure would be a great feature to have! thanks.