Wide angle lens in 8" Ikelite dome port

I recently acquired a 10.5mm wide angle lens for my Nikon D200 which requires the 5510.10 port body to be fitted to the Ikelite 8" dome port. I had read in a couple of reviews that this Ikelite setup is not an ideal set-up as the dome port can spin on the port flange and release itself accidentally. Last week I took the new housing with the 8" dome port fitted to the 5510.10 body for a dip without the camera in the housing to test it for leaks .. no leaks everything was okay, but I came to realise just how fragile this set-up is. The dome port can easily spin without much effort and potentially release itself off the housing. Has anybody come up with a suitable solution to keep the 5510.10 port body locked to the housing ... so it can't inadvertently 'turn off'? Your suggestions would be much appreciated. regards, John.

Contributed by John Natoli added 2007-10-30