do you mean the "Fans - Not Just Blowing Hot Air!"? I gave that a read, little confusing but the got it for the most part hehe. So how do I know what speed to set the 340cfm inline fan? If theres ducting and obstructions do I just guess? So without changing fan speed it would just stay at full strength and that would be too much?

I drew a setup of what I imagine it to be like. The other thread talked a bit about vertical growing, but i think with my reflector its best to stay horizantal.

they were also talking about "flanges". I had no idea what those were lol i looked it up and seems there just like washers or something. do i need those or can i just duct tape everything to the ducting?