Due to other commitments we are not doing any topcovers at this time. Please see our friends at: http://uziparts.com/
Picture below shows that the base is welded from the bottom.
Close up of the custom base detail. The custom base is machined to accept the Burris Fastfire base with no mods. The Burris Fastfire base will also work for the Docter Optics.
The base on the Mini is like a bridge so that the slot cover can go under it.
This is what the sightpicture looks like on the full size and Mini.