Since that Verito is mounted at the back of the rear cell, do you not have room to mount the Sinar shutter directly behind the front standard?
I use this same setup with the intermediate standard on the Norma for barrel lenses which extend behind the lensboard. However, my Sinar shutter interferes with the tilt angle indicator on the Norma intermediate standard and won't seat. I have an F standard which works fine. But I'm going to replace the tilt indicator with a thick washer so I can stick to Norma bits.