Hi, I want to replace the wheel trims on my 1993 Xantia SX. Currently the trims are held on with the wheel nuts, by 3 wide spokes. What im asking is: 1. Can these be removed without taking off the wheel nuts, i.e. a different type of clip on/off or do I need to get the nuts removed first? 2. Once the trims are off, can I replace them with any type, such as a clip on, or will the nuts get in the way as they have been designed for the original trim? Thanks.