Hi Jusri , the design looks good, however as I did not tried, I can't say much. But I really like the design , and your images looks impressive too. Sadly 85$ It's very expensive in my opinion, I think for those money you could build one home. But thanks for sharing it with us.
This diffuser looks really great and regarding your photos, the result is here and that's the most important.
The auxiliary lighting is on the left side or it's just the inlet point?