Jeez Lian-Li also has some weird fan setups.
The front fan of their V1000 is fine, but only fits 120x25mm fans. I wanted to get my 120x38mm Panaflo in it, I went through some weird stuff to get it to fit. I flipped the fan rack inside out so it's sitting behind the mount for it, then inserted a screwdriver through the passive cooling holes to screw the thumbscrews down. The filter doesn't fit anymore, but what good does a filter do on a case like the V1000.
My rant of the day.