I listed all the parts in my post titled "memphis shades batwing fit up" I'm not sure what the part #'s are on your mounting plates but the ones I had to use were for the Yamaha 950 I think! The CT has now out lasted 2 fron MT, I ride pretty much ever day minus rainy and icy weather. My other ride gets 10mpg!!
Could you post a picture as to how your bolt/nut looks underneath the rubber mat? It seem the the bolt sticks out a bit. Is there an advantage of inserting bolts from the top rather than the bottom. Great idea and will surely give it a try. Thanks.