My tent is almost ready, waiting on ballast and lamp.

My newest purchase was a rubber 4" coupler. I installed it yesterday and tested it a bit ago and I like it better than metal ducting for connecting a fan to a scrubber.

Here are your pics:

Overall Closeup

I don't like how it bulges but we can fix that with some Stoner ingenuity ^^^®

What are some ideas you guys might have?

^^sent using my phone, sorry if the formatting is off.