I have the Park Tool one and it makes cutting really easy. Use a fresh carbon-diamond blade in your hack saw.

Once I managed to crush the end of a carbon bar with a bar-end (despite claims it was carbon-safe). I decided the bar was a hazard and tried to break it with a sledge hammer (after I took it off the bike). It was impossible to break it with a heavy sledge hammer, but easy to crush the end by over-clamping. Such is the nature of carbon fiber.

Ritchey should be safe.