I know I am asking for a very rare setup.

Using Graduated Neutral density filter for street photography and with a small camera.

This is meant for places that a larger camera with GND is deemed too heavy, too dangerous and too awkward to handle. I had previously used a panasonic GF1 with interchangeable lens and the ultrawide does not fit a filter due to its bulging lens. Now I'm thinking of getting a higher end but fixed zoom lens compact camera as i need the flexibility. I'm looking at Fuji X20 as it has a optical viewfinder. However I'm not sure if it fits RF75, how it can be molded to fit one, or should i consider another camera.

Anyone like to share his experience with attaching small GND holder to your little camera?