Bill,
in some of the speaker workshop forum post and links I noticed that some who could not get it to work at all had little trouble after the jig was made. Something about cable and aligator clips/crimps playing havoc with calibration values(sensitive i guess). there is also a modified jig that is somewhere on the SW page, supposed to be more flexible or...(it's not hard to find) The article I found most informative is below. Since you mentioned SW maybe you have seen this, but just in case.Thomas F.
P.S. I am making a jig and trying to get SW going very soon, so I will let you know how it goes, or any tricks I learn if I do well.