As a side note batpig, can you explain in plain English why only the front speakers + sub are important? Once there is the measuring gear why the rest of the speakers in the system are not needed to be "looked at"? (Even up to an 11.x setup!) The well-known method of cross-over splice setting/blending by way of sub distance tweaking comes to mind. But with the newly discovered PNP measuring gear each and every speaker + sub splice can be identified, eh!? Could it be that after the measurements the "well-known" method may be changed to tweaking each speaker's distance while keeping the sub distance unchanged? Just thinking out loud!