There is a new tab section in WinPCD to make it easier and, I hope, more intuitive for finding relative acoustic offset. This could already be done using the main design section, but that was not as intuitive and a bit clunky since it requires re-use of design section input. The new section is free-standing in that you can use it just for finding the offsets, then use those files and the offsets in other software with the caveat that you have to know how the z-axis is handled, whether positive values for offset place the center in front of or behind the baffle. WinPCD is, I believe, in sync with Jeff's PCD on this. Negative values place the position behind the baffle, more correctly, behind the origin (0,0,0).