I have a ceiling fan in the middle of my ceiling so the RealTrap mini's have to be mounted less than four inches from the ceiling. I'll have to try to get the other ceiling trap mounted.
Due to the size of my room I started with the longest insert in the bass ports, yielding the lowest bass output. I then tried removing the middle insert for the intermediate setting and liked the bass impact better, but the room was getting overwhelmed at certain low frequencies. Duke sent me a port length about half the usual size and that is working well.
I'm really happy I ran across Duke and took a chance on his speakers. THey are a great buy and I feel no urge to upgrade.