This isn't so much a technical question versus a studio configuration question. I just bought the ABR800 Ringflash with the 30" moon unit & mask set. I did this primarly because I wanted to try and provide some unique catch light reflections in the eyes of my senior portrait customers.

So, I set it up and was doing some testing. I was 'hoping' that the reflection would be large enough to reflect in the iris of the eye rather than just the pupil. I aligned the model looking straight into the lens as well to center the reflection. But, I keep trying to get closer to increase the reflection size in the eye. My new Nikon 70-200 has a minimum focus distance, so I switched to my 85mm prime. The reflection never was larger than the pupil. I haven't tried my 24-70 or my macro because I think it would not flatter the facial features.
The light source itself is nice but I already have a glamour dish that is prtty close to ths in the lighting results.

What am I missing? This is a quote from the 'Studio Flash explained' section in your Help section "With or without the Moon Unit™, the ringflash can also provide interesting catchlights in models' eyes and is, of course, an excellent light source for many product and architectural applications."

Does anyone have some suggested setups for this in a studio to achieve what I thought I could do - or are my expectations to high?

Thanks for any help you might be able to provide.