The KT LCD3 and LCD8H are interchangeable at least they are on my Radrover but all LCD8H connectors are not the same. I've purchased two of the colour displays from China and they have five pin green connectors but not the same male/female connectors Bolton's supply, just the opposite. I like Bolton's connectors they come with screw on connectors.Nope. Not to my understanding anyway. KT displays work only with KT based controllers, and then just those set up for them. That's what makes Bolton's kits such a good value. You could talk to him about selling a kit with the LCD8 display instead of the LCD3.