Deco Rico

Well it's been asked here before... but the poster only said he'd worked it out and didn't actually say how!  Arrggghhh!#*%^&#!!!!!!
http://wetpixel.com/...showtopic=38069

So after removing the front plastic cover, the clear lens can be turned through a small angle.. but won't lift out or slide out.
What next??

Does the sync cord connector have to come off first, or perhaps the power knob on the back, or both?

The DS50, DS51 and AF35 all look like the exact same mold... so I expect will be the same to take apart.

Thanks... this is driving me nuts...