Thanks for providing the article, Scott. Everything it says is well explained and makes sense. However the kind of surge protector it addresses is the kind that utilizes sacrificial "varistors" ("MOVs" being the most common type of varistor), in designs that shunt surges to ground.
Most inexpensive surge protectors, that are commonly used for computers and other non-audiophile applications, are designed that way. However I believe that the majority of relatively expensive protectors and conditioners that are marketed to audiophiles are not designed in that manner. For example the BrickWall conditioner/surge protector I used to use, and the Audience conditioner/surge protector I currently use, do not use MOVs or other sacrificial devices and do not shunt surges to ground.
So hopefully RS will respond about the suitability of connecting their particular design to an autoformer.
Best regards,
-- Al