tkr, You got me interested in this topic. I don't know why; I am pretty much sated when it comes to tonearms, and the SAEC tonearms would not be on my menu, even if I were in the market. Anyway, if you search on "SAEC 506/30" here on the Analog Forum, you will find quite a bit of discussion going back more than 10 years, mostly of other SAEC tonearms, but there is a little info and comment on the 506/30. Here is one lead that may tell you something about alignment. Many comments noted that the OEM ceramic headshell is a negative and should be replaced. One person mentioned using a CF headshell instead, but any headshell not make of ceramic should be an upgrade. Good luck.
https://forum.audiogon.com/discussions/emt-927-vs-micro-seiki-5000-or-8000-different/post?highlight=SAEC%2B506%2F30%2Btonearm&postid=392781#392781http://
https://forum.audiogon.com/discussions/emt-927-vs-micro-seiki-5000-or-8000-different/post?highlight=SAEC%2B506%2F30%2Btonearm&postid=392781#392781http://