Well, my Adire Alignment Tempest is built! All I'm missing now is installing the whole works into it. I had it built by a professional carpenter; there was something he did that modified the overall size of the cabinet, though. He used 1" MDF, and followed the Adire instructions. So, the box, without ports, has a 207L volume. I have tried to use LSPCad to help me with the port length (I'll be using the 3" flared ports), but so far, I haven't had much luck. And Unibox & WinISD are giving me different answers... Can anyone help me calculate the final length of the port so that the box is tuned at 15.4 Hz? Thanks a lot!!! Javier.