You missed your chance at Halloween to flip the mounting plate over to mount the flash below the camera.
I've never used a Koni Omega, but I've had similar problems with other cameras. So far, I haven't found a perfect solution. I did find a now-discontinued model of a Stroboframe MF flip-flash bracket that comes close, but still not perfect. You might consider making (or having a machinist make) a different, potentially offset base plate that would better fit your Koni Omega, and then mount the little adapter block from the Metz 45 onto that plate.