Standard cradle from GPS unit, mounted to a small rectangular piece of aluminum, mounted to a piece of plastic with some grooves in it to accept a couple of o-rings. If I had a larger diameter piece of plastic lying around I would have skipped the piece of aluminum. Shove the whole mess in the fork tube and you're done. I have done this on four different bikes without an issue, close to 40k miles. I don't understand the extra pieces needed with the ram mounts.