Some engines are just too loud for my liking, I know I could change the main gain settings for each engine but I wanted a more general solution, so I created a "*_engine_ecu_silent" where I just copied the standard ECU and added the lines: "soundConfig": { "$+mainGain":-10, }, "soundConfigExhaust": { "$+mainGain":-15, }, This works fine but what if I wanted to make this adjustable? Like 1) creating subslots for -5, -10, -15 and so on? Do I add: "slotType" : "engine_volume", "slots": [ ["type", "default", "description"], ["engine_volume_default","engine_volume_default", "Engine Volume", {"coreSlot":true}], ], and then later multiple sections with slottype "engine_volume_default": like "engine_volume_-10" etc? That have just the above lines in them? 2) adjustable in tuning menu: or I could add in the "engine_ecu_silent" variables: "variables": [ ["name", "type", "unit", "category", "default", "min", "max", "title", "description"], ["$maingain", "range", "dB", "soundConfig", -10, -40, 0, "Engine volume", "Engine volume", {"stepDis":5}], ["$maingain", "range", "dB", "soundConfigExhaust", -10, -40, 0, "Exhaust volume", "Exhaust volume", {"stepDis":5}], would this be the right way? I hope this wasn´t too confusing, but it kind of is for me. --- Post updated --- I kind of got it to work, but it doesn't 100% do what it´s supposed to do. The two values seem to be depending on each other. Here is the code I added, maybe it is useful for you, too, and someone can check what is wrong: "variables": [ ["name", "type", "unit", "category", "default", "min", "max", "title", "description"], ["$volumea", "range", "dB", "Main Volume Control", -10, -40, 20, "Engine Volume", "Engine Volume", {"stepDis":5}], ["$volumee", "range", "dB", "Main Volume Control", -35, -40, 20, "Exhaust Volume", "Exhaust Volume", {"stepDis":5}], ], "soundConfig": { "mainGain":"$volumea", }, "soundConfigExhaust": { "mainGain":"$volumee", }