Plant is getting too big

Another vote to put the fan and filter outside the tent. That way you don't loose any height. I set the filter on the ground with the opening facing up. Then put the fan on top using a rubber boot plumbing coupling to join them. Then I use PVC pipe to make a "snorkel" to go in near the top of the tent.

Like Papablob said you can put it outside, Just take the white pre filter and have that on the inside against the walls of the carbon filter, then the fan blows into it. here is an example of both directions. https://m.media-amazon.com/images/I/71OKwZm3OSL._AC_SX679_.jpg Happy Growing

Papa fume tout. Et si si tu met ton filtre à la sortie de ta ventile, et que tout est bien étanche, ca marche Nikel. Moi je le fait.

Scary looking construction... get a smaller one (and dont know what papa is smoking but if you filter is outside there in no point of having one in the first place) or try to make some more space in some way like trying to fix it slighty diffrent or something. Maybe a bit LST could do but that has its own risks... There is also the chance your Plant wont stretch that much anyway.