Big Brother is lighting you

Although the NEX5 is not yet a perfect system for macro photography, I really enjoyed the ringflash project. So I decided to make a bigger version for the my DSLR (sony a100). I have two macro lenses for this camera, a minolta 100m f2.8 macro that is one of the finest piece of glass. I also like my sigma f2.8 50mm macro but the 100mm macro is more versatile and a bit bigger challenge to make a ringflash for it, due to the longer subject to lens distance. I had to use a bigger diameter tube to mount the fibers on it and tried to make the brunches of fibers adjustable. I'm still thinking how to make it appropriate for closer distance, when I use it for supermacro.
Few days ago I finished the Big Brother:

One added function compared to the previous ringflash adapter is that I drilled two holes to the bottom part in order to adjust the focus manually. It's not perfect but not bad. I used velcro around the tube to fix the fiber brunches. The idea is that in this way I can adjust their position and even their angle. The attachment of the other end of the fibers to the on-board flash is still not perfect, but it works. I used some cardboard, ducktape and a bit of velcro. And finally some pictures taken with the rig: