Although I have had several prototypes, and I’m happy with the functionality, but the construction of the switch mounts on the steering wheel do not match up to with my expectations or desires. I’ve found this photo, and it’s a bit overloaded with buttons for my car, it shows how the button mounts are manufactured. I’m not quite ready to make the final product, and I certainly don’t have all the equipment (vacuum bag etc) to create it, but I’d like to make a start.