Anyone using the mackie control in cubase pro 9 ,question

Does anyone know what the smart switch delay setting does in devices? And has anyone running extenders? I would like to know if they work and can bank up 8 or 16 tracks depending on how many units you have…I love the mackie control,it does everything I need it to do…wish I could get the nuage system ,but with the console there I have no room for it …I have the mc on a locator stand to my left and my hand is always on it!!!

Also does cubase support the c4 ?