I am looking at getting this new (?) device but needing to know whether it actually comes in two versions: a) 1/4" threaded; and b) separate mounting screw into female ballhead thread mount? Or whether the device also comes with a 3/8" threaded base. The latter would be preferred saving having to rip out the 3/8" from my leveller and replacing it with a 1/4" so to fit the Slidefix Quickset device. Many thanks...