I haven't seen the SX series yet or worked on them for myself or anyone. But I change tuners often, many over the years.
First, we look at your guitar above, and of course the link from Guitarfetish to the new gold tuners. I see, with some eye straining
and from the tuners themselves that they would appear to be a direct fit. The job is not hard.
You would want to change out the bushings and all parts of course, so before you order it would be wise to remove a tuner and measure a hole in the headstock to see if it is slightly larger than 10 mm. such as a Squier Affinity or otherwise typical, modern off-shore Fender product.