So, firstly, Im not associated with this product but I stumbled on something that can fill out the sound of your CBG chords. It's called a plectone (yes, they have a website with that name) and it is essentially two picks sandwiching a bit of silicone to keep them about 3/8 inch apart. When you pick with it you hit each string twice and it sounds like you have twice as many strings! Cheap b*&tard that I am, I made my own by gluing two picks together with a double layer of neoprene from an old mouse pad. It actually works to fill out the sound if you are just strumming.