RB-90 is equal to the Eli DO and the RB-120 produces a softer light. The eli is pebbled and the RB is smooth and has more contrast output with the defusers on you will not really see any differences between the too.
The Black On Black one with no zipper was the first prototype and it has black inside velcro piping. The one Edward sells has gray piping and inside velcro piping. You will want to make sure you velcro the back vents closed to not see the black velcro. If you don't close the back vents properly you will see the black velcron 4 lines in the catch lights and will have wrinkles in the RB. The picture above shows the vents fully closes properly and on both the prototype and the one for sale. You can see the black in the prototype and almost seamless in the new version.
If you don't want the black zipper showing up in the catch light on closeup images you will want it at the top of the box or place the diffusers on.
thanks for the info. I am definitely ordering the RB-120 now. BTW.... what is the function for the zipper?



