Ron, the focus of my previous reply is based off these words you wrote.
Experience has proven that some owners, but not all, have had laser alignments and still suffered excessive tire wear. Owning both ROLO laser alignment equipment, and additional alignment equipment that does not utilize lasers, both systems can identify misalignments, correct alignments and more.
In regards to the ROLO laser alignment system referencing the expected thrust angle, sadly, that is all accomplished utilizing tape measures at multiple locations, each possibly adding errors.
Returning back to your quoted words, I have seen enough improperly aligned Spyders where customers paid for a ROLO laser alignment, and when requested to be checked on account of tire wear, the misalignment was substantial. Whether the tech utilizes a ROLO setup, or other accurate means, the techs quality of craftsmanship and understanding of the task relates to the value purchased.