Hi all,
Upon searching and asking questions about the timing tables in tuner $8d i was still sceptical as to weather or not initial advance
was added or not .
Today i mailed tunercat about my question - and a quick reply as usual. here it is:

Hi Tom,

This depends on what version of the $8D ECM Definition File you're using. Earlier version mistakenly included the initial spark advance value into the Main Spark Advance table. Since this value is the initial spark setting that is mechanically set by the distributor it is not a spark bias for the main table and should not be included in the table values. If you are using the current $8D Definition File (version AB) the initial spark advance value is not included and you would need to account for the initial spark advance when relating the main spark advance table values to actual measured spark advance.