I have been hearing that you shouldn't use aero's in a wall. My new design I am going to have to use them because I don't have enough baffle space to do any slot. Anyways I know Mike Huges is big in the SPL game and his wall with the three 18's has a lot of aero ports. I will be doing the same type of thing with 3 18's and then plan on using 4 8" tubes. Here is a pic of his setup and a vid which looks like its pretty insane.
