I just want to say thank you for creating WinPCD. As I mentioned in a earlier post I have been working on a 2 way using a sb17 woofer and a heil tweeter. Over the years I have accumulated various versions of the modeling tools most folks use (Calsod, Lspcad, SE, PCD) and have found them to have their pros and cons. This time around I bought an omnimic wanting to make it my primary measuring tool. I tried my best to figure out how to import the data and use PCD but could never get the model to agree with omnimic. I'm sure I'm doing something wrong and someday I'll figure it out. Meanwhile, I came across WinPCD and after spending a bit of time getting to know it, it works great. I get excellent agreement between the model and the omnimic measured result. Small subtle changes are easily distinguishable and measurable.