Ikelite 7D housing - focus lamp ???

The new Ikelite 7D housing has a spot to mount a focus lamp at the top of the housing... its a block of delrin with a threaded

hole in it..

What mounting hardware is the best suited for placing a focus lamp there...

I'm thinking Ultralight or the Amphibico version??? What are your suggestions or what are you using??

I noticed ultralight now has a extra long clamp AC-CSL to extend the focus lamp out a little further....

I'm using the ultralight stud with just a single clamp (the normal one) connecting directly to the ball on my big blue focus light. I only have one dive on the setup so far, but it seemed to work reasonably well. Only gripe is that when tearing apart/assembling it's a little tedious to open/close the clamp each time. Really minor gripe though.

Edited to show the setup. Realized I had a (poor) photo on hand.

eric