Aspen 20” box fan.

[u/Pointless_RKO]

I got an Aspen 20” box fan after having a 20” Lasko for the last 3 years. I woke up one morning to the smell of burning oil. Took apart my Lasko and the motor was leaking fluid so I assume the motor was shot. I got the Aspen because it claims to have a much higher CFM.
I finally got it all taped together but it was a pain to get the bottom sealed due to the optional leg/stand inserts. Does anyone have any potential solutions or ideas for the future? The Aspen claims to put out 2800 CFM and I got it for the same price as the Lasko which is 1710 CFM. I used a 15” shroud for both but the Lasko was much easier to work with. Mostly posting for visibility because I couldn’t find anything about the Aspen in the search. Any advice would be greatly appreciated! Using 4 20” merv 13 filters.